Most shouts I see are for Ilvl 84 for T4, if you a healer, I think you can get away with 78-80, but the rest of the party you want 84 due to dps, than you want the tank 84, so the dps aren't stealing hate etc...honestly have you been in a t4 run where everyone is 74-78 instead of 80-84, its called "slow dps, oh yeah...we're dead"