Unlimited Earthen Shield

Thanks to www.hiddenstuff.com for the info!

1) Get in a raid group (It can be at max 15 people)
2) Have your group queue for AB or WSG.
3) Right after the queue message appears pick one player and earthen sheild them.
4) Repeate for your whole party.

Note: You can also log out to give the buff again to a fellow group members