i think it would be amusing if they made the tank LB changed so for a set time period you reflect damage back at the enemy. so if you use it before a huge tank buster that you know will do enough dmg to 1 shot you and/or the raid you use the tank LB (like in the fight with nidhog if est doesn't get the shield up in time.) it would turn all that damage back on the boss instead of you and the party.