[ONLY WORKS IN RUINS OF LORDAERON]
Alright so you're in the arena lets say 3v3, you're a warrior + rouge and a druid.
You want the druid to have the commanding shout and the melee's to have battle shout.
First go to one end of the corner with the healer. (remember to wait until 30-15 sec)
Next you go to the opposite side of the room with the melee's.
voila, now you have the attack power buff and the healer the stamina he needs.
Have fun.