Bruh, ability to kill one enemy with stripped armors for 4AP isn´t "making any difficulty a joke". For 4AP, your ranger or rogue could kill that guy anyway and probably deal some aoe damage in the process...
I play with a modded chicken that only lasts one turn, so rupture doesn't kill an enemy. But it does up to 1200 damage for 2 AP when my ranger hits for around 230 with an autoattack. For 4 AP you get a 1 turn cc + 800-1200 damage. Even if i could do that damage with my ranger with 4AP, the chicken combo has still a cc in it.