Hello, all,
I've just started another Ao100 HMP game. So far I found two uniques - Minigun and Butcher's Cleaver. Since there is no guaranteed chainsaw in this challenge, the Cleaver has already been of great help - killing Arch-Viles, Arachnotrons and Barons in melee while they refrain from their ranged attacks is great, as is conserving the ammo.
As for Minigun - I found it while already having EE(2) and SoB(1) and it worked great. I have SoB(2) now and it kills Barons in two volleys. It chews a lot of ammo to be sure, but it packs quite a punch. As for accuracy - chainguns are the same +2, so no big change here. Once I max SoB and EE I expect to mop up the floor. The main question, of course, is - will I have enough 10-mm ammo? I don't have much experience with Ao100 (reached level 30 once), but it seems that the only ammo in abundance will be rockets (from all those blasted Revenants). I'm afraid I'll have to take the Brute->Berserker route at some point...
Wish me luck!