I played some of that Rancor I don’t think I needs nerfs. Clear times are greatly dependent on skill and luck. I never played much of PB and it took some learning. My average runs were like 6 minutes at first.
Besides, pierce is one of the dmg types most screwed by mutators (Armored and Voidmarked = basically 7 minutes clear). Above all clear times are dependent on rolling fast running mobs and just being lucky that they line up.
Also it’s a g5. SR set Rancor has some crazy results for the absolute tankiness. But that’s a nerf SR set problem.