Berserk is already really good. If you take away the pacification effect and make it weaker it pretty much just becomes fight or flight. You'll just need to time your berserks in such a way that 1) You don't get pacified at a really bad time and 2) your pacification comes right after a skill so you really only miss out on 1 attack rather than 2.

Like already mentioned, work with your healers to get that leeched off. It's so nice to have that debuff taken off so you can continue hacking things.