epilogue dont really do much of anything on hard. takes forever per oracle. takes too long even for the champion minotaurs shields. that no impact is a KILLER
I shot the epilogue at the oracles and it took me about 2/3-3/4 of a clip to kill at level 29 with it being fully upgraded. I needed some help after the 2nd oracle, and I feel that it's completely fine. Have 2 people take out the Minotaur and hobgoblins for the first 20-30 seconds and then the non-relic holder helps with oracles afterwards.
Impact has no effect on an oracle. The only thing impact affects is to cause a mob to stagger. So yes against a Minotaur it's important, but you still need to burn through their shields first, and a void damage weapon is best at that.