Hiho,
I notice tanks sometimes get their asses handed to them while doing trash pulls while I can almost chill and do damage on bosses, so I thought, the game can determine where you stand in relation to the mob - does this work the other way around, too, like in the-game-that-shall-not-be-named?
Do you mitigate better when the mobs are in front of you? Or can stuff hit your back and it doesn't matter?
I have a problem with such situation, because I have a lot of tools I could use to reduce damage on the whole group, but I have no time for that when the tank is on the edge and I have to pray the DDs kill the stuff before the stuff kills my tank despite me spamming heals.