I am in the beginning of act 5 hell (P8) and can't progress further through the act. I am re-running first two areas to get the exp I have lost because I died rerunning these areas. The PI Ghosts from A1 were hard but doable for me. The Frenzytaurs are impossible to kill. PI and even though I can lower their immunity to just a heavy resistance, they're unkillable. How could a summon necro cope with them? Except s&e to re-roll monsters which the method I am using. And I will use it every time I see one of these too strong mofos !