Even with full a/b/s, fighting a berzerker is almost not worth the gamble - I've had god gear, full a/b/s, thirsted/etc, and I couldn't hit a thirsting villager for the life of me. Risking a sleep is almost never worth it unless you have the head or they're just really dumb at wearing zero saves or underleveled.

Unless you're a hilariously bad berserker build, you can destroy most APs unless they're already rolling with fire/lightning control and lots of charges with full a/b/s. It is *not* worth risking everything for RNG when you get deathblowed twice or more in a single round.