The thing about a villager for an AP is that you can usually be pretty safe outside raids. Assuming you have a/b/s/stoneskin, of course. Without those things, don't go anywhere near them if you care about keeping a weapon. If you have a/b/s then you're the one with the unfair lucky kill skill (sleep) in most situations. If you get a berserker slept you should be able to kill them in most areas with plague/energy drain/summon and hit n' run. If you have enough protections you can try for that sleep with very little risk.

Really, there should be some kind of adjustment for DR. If you kill a with-head berserker without any a/b/s then you deserve a reward.