How I maximize DPS as a Warrior is thus:

1st Method: The "The party only needs one tank, and there are two tanks in the party" method.

1. Turn off Defiance.
2. Profit

2nd Method: The "I'm tanking, but I really want to help DPS maximize damage while I'm tanking" method.

Disclaimer: Use this for bosses only! Other enemies will not be alive long enough to take advantage of this method.

1. Use Enmity-generating combo for about 45-60 seconds. That would be about 5-7 full, uninterrupted rotations. If the party generates a lot of enmity on their own, try shooting for a full 90 seconds, or 10 rotations.

2. Once you've generated enough enmity, switch to your Maim rotations and use Fracture in-between rotations as needed.

3. If you get 5 stacks of enrage, go ahead and use any of the three enrage-using abilities, depending on the situation. Unchained if you haven't used it yet, Steel Cyclone if you're trying to pull adds, or Inner Beast under any other circumstances.

When using the second method, under no circumstances should you ever use Berserk. Berserk ends with a Pacification debuff, which can cause you very critical seconds in which the tide of battle could change signiricantly. For the first method, you can trust the other tank to cover you, so it's fine. But if you're tanking, Berserk is a HUGE no-no. The damage bonus is not worth the uncurable stun-like aftereffects.