NPCs & Enemies Make Lunatic Cultist the difficulty of Duke Fishron

[Coleyohley]

More hp just make him more tedious to fight
Not necessarily harder

This isn't true when he dies so fast that you don't even get the chance to be killed by his attacks. In that case (which is very, very often  the case) giving him more HP gives him a realistic chance to kill you, which  is difficulty.

 

[LisanPaez05]

I was referring harder in the sense of the fight don't getting more difficult because the Cultist is more dangerous (more damage, new patrons or whatever)

Just more hp but still being the same

I agree with Dispenser