“Insta-pop” design in general can be quite flawed, but I think there are a few “good’” examples nonetheless.
Stated earlier, the Rampage Cyborg from the Mad Lab is a good way to handle an instapop, as it has a number of attributes that make it fair:
- It’s notably communicated through them flashing bright red, alerting players “Hey! This enemy’s gonna do something, I should back out!”
- The Cyborg remains stationary, meaning that you simply need to not go where it currently is;
- Finally, it’s also vulnerable, meaning that with enough DPS, you can opt to kill the cyborg before it detonates.
Another example is the Abundant Shield from Limoz’ fight in the Lair of Draconis. These I still consider to be decent, although not perfect:
Unlike the Cyborg, they are neither vulnerable nor stationary. They do still telegraph their impending attack, flashing brightly and growing large - which I think should also be added if they enter their “minion spawn” detonation sequence.
What makes them fair is that:
- their movement is simple and slow - just running backwards will be enough for them not to sit on you;
- their explosion is quite weak; strong enough to still kill an unprepared, unmaxed character, perhaps, but by far not enough to take down a maxed one; however, they still hurt and inflict Sick, which deters said maxed players from sitting on them.
Now for some bad examples.
I think the least bad offender is the Green Potion, as it still shares the “stationary and vulnerable” trait of the Cyborg. However, it has more health compared to it, and in addition, it has no real way to tell when it’ll actually explode.
Conversely, the most notorious one is the Rock Dragon Bat. This one was basically designed to make them sit on you; either with Confused or Slowed, they can make it difficult to run away from them.
Not only that, they’re quite fast, and their explosion is virtually instant and even deadly.
Really hope it gets touched.
The final example I want to bring up is the Parasite Chambers’ Painling. This one, like the Cyborg, is vulnerable, and it actually explodes when it’s below half health.
However, it’s still got some Rock Dragon Bat issues:
- moves fast;
- deadly in damage;
- explosion is instant.
From what I could tell, though, they don’t try to fully explode on you…but even then, the fact that the walls of the dungeon can conceal them does not help at all.