Now if you didn’t know already you can use all types of loot drop potions to get more from the quest chest! (i know I’ve seen a couple topics on this but decided to share my little technique) What i personally do is make a new character and assign that as my chest opening char, i start of by drinking a loot potion and open my chest then immediately get off that character, BECAUSE: when you exit the game on a character that has drank a stat booster like the loot potions, the affect will stay and not go down if you are not logged into that character.
So instead of either not using loot potions because you only have a few chests, or have to save up chests to open later with a loot potion (so as not to waste it), if you have an extra char slot just log in with that char when you are opening chest, and you will be able to always get more from the chest without wasting potions or having to save up.
Have fun opening better chests!