Berserk for PI's with Frenzy Barb build? I have a Frenzy barb and a frriend brought to my attention to maybe use berserk to take care of pi's. It sounds like a good idea but would take 3 points to get the skill so am wondering if its worth it in the long run. Also he was thinking that its a pure magical attack so IM wont do you any damage, is this true? Off topic but of the Act 2 mercs wich is most beneficial for Frenzy barb? I can see defiance helping out with lower def from loss of shield but a might merc can boost damage quite a bit. Right now am using HF merc and he's not doing as well as I had hoped.