If manaheal totems stack tank + 4 shaman teams will be so ridiculously overpowered it will be awesome.

Right now the only decision I ever have to make is whether to use mana spring or healing stream totems. If I don't have to make that decision anymore, I'll never have to rest, I'll hardly ever have to heal, my DPS will skyrocket due to hardly ever having to heal, etc. It will be F'ing AWESOME!