i'm a Lowbie L24 shadow priest but my sequence is:
smite, PW:P, Mind Blast, PW:S, renew, M.F., M.B again, and M.F again.
i can kill a same lvl mob w/o my shield expiring or absorbing too much dmg. this eats up about 600-800 mana. but i get 100% spirit sometimes for a few seconds that...