I've been here for a while without contributing with anything special, so here's my guide for double shouts in arena.
This subject has been posted before, but only in some rng version.
This is probably common sense for some of you, but i believe alot of people don't know this.
Only work with a Paladin in the team.
Lets say you're playing 2's with a Paladin, and you want him to get Commanding shout and you want Battle shout.
Let the paladin buff himself with Blessing of might, then you shout Commanding first, then Battle shout, IF the Warrior doesn't have Improved shouts, wich increases the health/ap gained from shouts, It won't replace the might buff.
Then your Paladin just buffs himself with Kings/Wisdom or whatever he wants.
1. Paladin buffs himself with Might and you with kings.
2. Warrior/(You) buffs with Commanding and then(after Commanding) Battle shout.
3. Paladin has Kings+Commanding and Warrior has Battle shout+kings
4. Profit!?