Resto shammy = a god in a healers grp. Wrath of air totem= 101 +healing and mana sping which is, with talents, about 30 extra mp5. also dont forget mana tide totem which restores 6% of max mana per 2 secs for 16 secs with a 3min CD (or something like that) so with resto shammy in ur grp, its almost impossible to run out of mana