Tank Stances.

[Bourne_Endeavor]

Sorry, this is a bit off topic, but could you expand on this?

If you only Block every third combo, Warrior won't pull hate from either tank. The only exception to this is during a swap, where you should spam Eye. So like...

Heavy Swing -> Maim -> Storm's Eye
Heavy Swing -> Maim -> Storm's Eye
Heavy Swing -> Skull Sunder -> Butcher's Block

Delay it once more if you happen to do a tank swap in between. Keep in mind, this only matters if the current MT drops stance. If they aren't (pug groups often won't), then rotate Eye/Block normally. You'll never pull hate if they have stance up. You can also default back to Eye/Block rotation if you have a Ninja managing tank aggro.