Lost Sentry (Rev. 16)

Tips and Strategies

General Tips

Note that as of Patch 26.X.0.0, this information is currently outdated.
While the Lost Sentry has enormous health and huge amounts of firepower, the Spectral Sentry defending him is arguably the most dangerous part of the fight due to its invincibility and armor-piercing shotguns. Avoiding the Spectral Sentry should be your highest priority.

Beware, as the Spectral Sentry will sometimes fly through the middle of the arena without warning.

If the sentry spawns with the setpiece connected to a setpiece (that contains obstacles such as walls) of another boss, like the cyclops god castle, it is possible that the spectral sentry will become stuck and unable to move. This lowers the danger level of the fight by an immense amount. However, is a boss such as the pentaract spawns on top of the sentry, it will destroy the walls protecting the players from the spectral sentry, making the fight even more dangerous than before.

Most of the fight will take place in the bottom left grassy area of the sentry’s setpiece. All of the phase tips are assuming that the players are fighting the sentry from this location.

Phase Tips

Paralyze spiral attack: Generally the streams are easy to avoid, and it is not difficult to weave between the shots. The red bombs are a little more problematic, but can be easily avoided as well by backing away. If a paralyze bullet hits a player, they probably won’t have to nexus because they should be able to move again by the time the next stream comes around.

Red rings attack: Ranged classes own this phase. They can stand back and weave between the shots, stepping left and rigt to avoid the petrify bombs. Melee and dagger classes have a much harder time with this phase as the projectiles in the ring are very close together. They can run out if they see the opening, but this is not recommended as the spectral sentry can pay you a surprise visit while flying through the middle of the arena. It is very possible to take one of the shots from the ring and run in and deal damage before the next ring is fired, but petrify bombs should be avoided because they freeze you in place, possibly causing you to take unwanted damage. Planewakler rogues and tricksters can teleport over the rings giving them an advantage.

Rapid spiral attack: This is one of the easiest phases. There are very large gaps that a projectile will never fly through in the bottom left grassy area. Melee classes can even stand in these gaps and fire upon the sentry without fear of being hit by a projectile.

Rapid spiral attack 2: Ironically, this is arguably the toughest phase of the entire fight. The streams of grey shots inflict quiet which can render a priest and necromancer useless, combined with armor broken and slowed that you will run into while trying do evade the quiet shots. Many classes should back out during this phase. However, if there is a priest and the group is confident, there is an extremely small safe spot in which no projectiles will ever hit the player. Unfortunately, this spot is very close to the path of the spectral sentry and if he flies through the middle he will deal massive damage.
The safe spot is in the location indicated by the red marker in this image:
https://imgur.com/gallery/yzugv

Crossing streams attack: If rapid spiral attack 2 is not the most difficult phase, this one is. There are two parts to this phase; the part where the crossing streams are to the left and right, and the part where the stream is directly in the middle of the fight. When the streams are to the left and right, avioding the sick shots should be hightst priority, but other than that there isn’t much danger. However, when the streams are coming into the direction of the fight, they are extremely deadly. There are a couple of ways to do this part of the phase. If a player feels very confident, they can stand in the small area between the streams. This is extremely dangerous because a small miscalculation can lead to the player getting hit by both of the streams at the cross, which is a very quick death. Along with being in between the streams, there will also be sick bullets flying out fast and there is not much room to run. Rather than standing in the small space between streams, players could also step left and right of the incoming stream while dodging the sick shots. This is much safer than being between streams, but it requires players to be much closer to the spectral sentry. As always, if players feel overwhelmed, they could always exit the fight for this phase.

Wavy streams attack: This one is not very difficult if done the proper way. Take note that if a player stands within range of one bullet and not the other, they will still be hit with everything because the shots alternate and “wave” from side to side. This means if a player gets hit with a single paralyze projectile during this phase, they will tank the full stream and either die or lose massive amounts of HP. The way to avoid these involves the slight variation of the source of the projectiles. The sentry will not fire all the streams from the exact spot, rotating clockwise very slightly every time. This means that stepping left will make it nice and easy to avoid taking a hit, but stepping right poses a much higher risk of taking damage. The most effective way to do this phase is to step right after the first stream is fired so that it is safe to step left and avoid the stream of paralyze very easily. The reason always stepping left is dangerous is because it puts players very close to the spectral sentry. Basically, just avoid getting hit by the yellow stream and this phase is a piece of cake.

Boomerang spread attack: An extremely easy phase with a very wide safe spot. standing between two of the sick bullets will allow you do evade every single shot of this phase without ever taking any damage. However, the spectral sentry is still a threat, but there is a lot of room to run during this phase so it is possibly the easiest one.

Individual Class Tips

Wizard: A good choice with a good group. Lots of damage from the spellbomb plus his high dexterity make him a class that can can evade shots and deal damage from afar. However, he is very squishy, so he can’t take too much damage or else the player will die or have to nexus.

Priest: Without a doubt the best class for the sentry. If a priest has a Tome of Holy Protection, he will take a lot less damage than normal (still a lot from the spectral sentry due to armor piercing) and can heal players along with himself. A tiered tome will provide a massive health boost, but the two best tomes are the Tome of Purification and the Book of Geb because they both remove negative effects. The Tome of Purification might be a better choice due to not having the speedy effect because speedy can cause the player to accidentally run into projectiles. Overall a great class for this fight with extremely long range and the vital healing ability to combat his low defense.

Archer: A good class with the doom bow. Other bows work fine but the doom bow has a very high DPS and it is easy to aim your shot at the stationary sentry. The quiver is not too useful for anything other than damage because he is either immune to all the debuffs that the archer can deal, or they are obsolete because the sentry is a stationaro enemy. He takes less damage than robe classes, but like all classes he will still take a lot of damage anyway. Not the best class, but good in a large group.

Rogue: If a player is looking to solo the sentry and does not have a priest, rogue is the way to go. Cloaking will make the threat of the spectral sentry go away, meaning the player only has to dodge the lost sentry’s attacks. He can also teleport over the rings in the red rings phase. Unfortunately, the rogue has to get uncomfortably close to the sentry to deal damage, so this class is mainly used in large groups when the player is looking to complete the lost halls dungeon that drops after the sentry is defeated.

Warrior: With a large group, or a smaller group with a priest, the warrior is a good class to use. The speedy buff will make it difficult to dodge projectiles as they will come very fast, but the berserk buff will make the fight take a significantly smaller amount of time. However, the range on swords makes it extremely dangerous for the warrior to get damage in, so he is not a good chioce for a smaller group. The only exception is the Helm of the Juggernaut, which increases defense by a significant amount for a short time while sacrificing speedy, but this helm is incredibly rare and most people would never take a chance at losing it to the sentry.

Knight: Not the ideal class choice unless sitting out for the entire fight is what feels safest. Since the damage threshold is very low, knight can run in, get in a couple seconds worth of damage, and run out. Even with the minuscule number of shots, the threshold will still most likely have been reached, guaranteeing a potion. Stuns are obsolete at this boss because both the spectral sentry and the lost sentry are both immune. The only use for knight would be if he had a Shield of Ogmur, because the armor breaking buff would increase the damage dealt, but since this is a very dangerous fight it is best not to risk losing the ogmur and just picking a different class.

Assassin: The assassin can be a good class choice due to the poison. The dagger is not an ideal weapon for this fight but certain poisons make up for it. The UT poisons are both very good choices for the fight. Murky Toxin is more hands on and requires the player to be consistently in the action, while plague poison is more background work and the player can spend most of the fight from outside the set piece. If the player has a Murky Toxin, the lost sentry is a perfect target as it is always completely stationary, allowing for a very easy throw to hit both bombs. However, the throw has to be aimed right on the sentry for this to happen, which means that they must be close to the action. However, if the player is lucky enough to wield a Plague Poison, they don’t have to do too much work. They can take a few steps into the arena, chuck a poison in the direction of the sentry and run out. The sentry doesn’t even have to be on screen, as the range will be long enough to inflict damage. However, the Plague Poison only does 500 damage, so this will have to be done many times, but it isn’t very dangerous.

Necromancer: The necromancer is a good class choice with any skull but the Memento Mori. The healing is very helpful, just like the priest, but the staff deals more damage. Other than that, there isn’t much more about the necromancer that is different from the wizard. He has less del than the wizard, but the healing ability combined with the little bit of damage from the skull greatly makes up for it.

Paladin: Like the warrior, the buff is extremely helpful in a group. It will allow for more damage from everyone and combined with a warrior’s berserk buff, players become killing machines. When warriors, paladins, and priests unite, players become damage dealing, fast shooting, quickly regenerating killing machines. Just like other rare items, the Seal of Blasphemous Prayer gives complete invincibility, but shouldn’t be risked here. Plus, the invincibility only lasts for just over a second, so it wouldn’t be very useful anyways.

Huntress: Almost the exact same as the archer, except for the trap. However, generally the quiver is better to use than the trap because if a player misses the trap for some reason, the sentry will never walk into it. A Trap of the Vile Spirit will deal a lot more damage than other traps and it’s not too risky to use due to bows’ long range, but overall, in this fight, archer reigns supreme.

Mystic: Probably the worst staff class to use unless the player wields an Orb of Conflict or a Soul of the Bearer due to the damaging buffs. However, one paladin will make both these orbs completely obsolete, so it is best to use a wizard or necromancer to ensure that the fight is getting done in the most efficient way.

Sorcerer: A great class with unbeatable range. Obviously not as good as the priest due to the lack of healing buffs, but the scepter can be good for clearing other enemies that are in the way of the fight, especially if the fight is in godlands. The Scepter of Devastation will deal massive damage if there are no other targets, making it a good choice if a player owns one. This fight is not terribly difficult on a sorcerer due to the long range so if the player does not have a priest or there is one already there, sorcerer is the way to go. This is also a great class to learn the phases on, as the player can still deal damage while staying back.

Trickster: Not typically a great class, because of the dagger. No ability really makes up for this as the sentry just fires away and doesn’t target players, rendering the decoy useless. The spectral sentry can be tricked but when he goes around he will just start firing at the group again anyways. The trickster can use teleportation to get over the rings in the red rings phase, as well as quickly escape tight situations, but the prism isn’t very useful other than that.

Ninja: The ninja is generally not a very good class for this fight. The katana puts the player dangerously close to the sentry, and that does not work well with leather armor. The speedy buff from the ability doesn’t help, and the ability is okay but isn’t enough to make the ninja a good class to fight the sentry with. It’s possible to be more safe using a Ray Katana, but players should do themselves a favor and hop on a different class for this fight.