This is a very useful totem for pvp, because using lesser heal in pve is not considered mana efficient and only used in emergancies.
And in PvP you expect bursty damage so casting a long heal might not always be the right choice _And_ in pvp mana isn't an issue.
And in PvP you expect bursty damage so casting a long heal might not always be the right choice _And_ in pvp mana isn't an issue.