This is gonna make people mad but what I feel like should be done is that killing him shouldn't be as hard as it is..
W/o Succubus Shield you die from his special attacks, and therefore have to pay 600K to get in again, kinda bogus..
With Succ shield you take 350 damage, but.. if another person is there with you, somehow you take 350x2, and so on, especially the other player, which should be fixed, because that's kinda broke if you ask me.
People only use KK as a darting npc, yet the drops are V.Rare which is what 1/500+? The odds are kinda bad there.
What I propose.. is that the special attack from KK shouldn't be a random hit.. it should be like a 5-10% chance out of its attack styles to even use, instead of it being 1/3 or 1/4 where he can do it 3-4 times in a row, and just make things ridiculous. When you go in and get spec'd 4-5x in a row and go home to not lose 5M+ or more on losing items and making KK be a complete money sink thats got no benefit plus an additional half mil to go back in, it's absurd. Quite honestly I'm surprised nobody else has complained about this yet. It's better if he can use his regular attacks for most of the fight plus the poison special more often than the 1-shot, or cap it where his 1 shot is 990 damage and not 1400 or so when wearing t80 armors or something. Players that wanna fight him regularly with the drop table he has, have no chance of killing him.
When I say this, I mean for people that don't have endgame items.. because there's gonna be someone that will say "Oh hes ez to kill with tbow, sgb, git gud with ap3x armor" and tbh there isn't MANY people, more like a few that even have these items to begin with.
So the summary of this suggestion, fix KK to where people can atleast have a chance to fight him and not have stacked special attacks when more people join the fight, and all that. Not sure what else to say on this but.. it's just an annoyance with the way it is lol