Don't forget about Determiniation, its good when u fight small packs of mobs or a boss that change aggro and hits every member of your pt.
At the end Determination is more effective then brutality (when it reaches 100%).
I even noticed that on allods where u have fire or gas cloud debuff, 1-2 hits of it triggers very quickly 100% on Determination bar.
You must not get a lot of astral then.
Because the healers need to concentrate on keeping the tanks alive not on keeping the squishy mediocre dps up.