For those of you saying the final boss is hard:
2 poison wands or orbs and anything with +4 block on all your knights, they don't even need to be maxed out
Try to have at least one person with an area attack, major knight and miner knight are a must because they attack twice and stack poison easily.
Any spells you want. i personally used the block one and the stun one. never touched my heal spell.
your formation could either be the last one or the assassin one for more poison.
I had him at 800 stacks of poison then just killed the monks at the back.
@arfas
most likely that's not a randomization thing.
Enemies come back slightly stronger after each kill. Thus, you could have 5 damage enemies, and 30 dmg enemies on the same screen