470 x 3/10 = 141k hp every 30 sec.
(i was testing it and NG gives less hp than that - arround 100k)
The totem is healing your for 133 + 33 x 5 = 298k every one minute
So NG will be better, but the way it is right now is too much.
Every time you use burst the shaman just uses the totem and GG. Impossible to kill.
Ye hes right . enh > ele > resto