The final boss is so good, unless you have insane health, he really quickly kills you, so you need good dodge and block, as well as good skill timing. It does take quite a bit of grinding, but its worth it.
the game feels incredibly grindy, roll dice, upgrade them, roll them some more, ascend them, get some cards keep going the only thing that really feels like "progress" is getting all 4 kings, as it is the best buff, but then its just high money grinding.
my strat: alternate between slows and cursed(having 3 cursed and 2 slow per stack) but if there is invis enemies put eyes in the mid of stacks so they are most effective
I honestly don't see why ppl are complaining about it being "grindy" because ye it is a bit grindy, but so were the first two and with the right skill, its actually qite easy, bcus on mobile, I hit cookinator for the first time on the 8th, killed him on the 10th