Firstly: Do not try and kite people if you do not know what you are doing. I've seen many ASTs and SCHs try to do this only to fail so hard. It can help, due to you taking all the damage while your team swoop in a kill unsuspecting healers while the DPS are all oblivious but other than that, there's no real need for it other than making the other team angry they can't kill you.

Do not spam Aspect. Benefic! I see many people think this is healing when it's not, they will run out of MP the first minute into battle. Make yourself unknown, stand far back allowing yourself to hardcast Benefics. If you get targeted, you have Surecast, Blizzard 2, Equanimity, Lightspeed, Celestial Opposition and Attunement