I have max heal, blind, fire totem, 3/4 armor skill and I do great in PvP and in dungeons. Fire totems does massive DMG and with ur normal heal mixed with lvl 1 heal totem I heal about 600 each tick but if u have high crit u normally don't have a problem. So I don't think much need to lvl heal totem unless ur doing mainly dungeons or having trouble keeping urself alive in PvP. But again u lose DMG witch can be bad if ur facing pro melee with high life steal like immobilize. Or facing another healer.