The Corrupted Empress

The cooldown on pots seems to be pretty long. Like 30 seconds or something. Definitely long enough for you to get killed before you can use it again.

If this is the case, then there is only one class who can take the fight. Paladin. Barely getting hit and if get hit, the damage is close to none. Self heal every 30sec so can take turns, pot & heal.

I think that empress will summon the knights one by one. As seen from the video, she summoned the warrior and went to background. Seems similar to PB and statues. I can bet that after all the knights are taken down, she will step up and fight herself. So the main focus should be taking down the job instructor and not focus on the minions they summon. In the videos case, rush the warrior in corner (Paladin to take the hits) and let the monsters keep attacking Paladin. Meanwhile other attackers can focus on killing and not getting hit. Buff paladin with all the defence buffs can find (Combo barrier, smokescreen) and mechanics healing robot if things get too tight.

Also didn't they change the defence scrolls? Paladin with perfectly scrolled defence gear can easily take all the hits in this fight and be the tank for the rest of the squad. I think this might be the key to beat her. Seems more similar to other games like wow f3 Not that it's a bad thing tho.