I don't exactly have aggro/damage issues with my tank either, nor do I have mana issues with my shaman, so I may give Seal of Wisdom a try myself.

I currently only use one Healing Stream Totem becuase its more to fill my shaman back up after some damage so I don't have to stop DPS but going 2 and 2 with Mana Spring or even 3 and 1 may not be a bad idea to fill that role more if the mana still is not an issue. And since my level 76 water shield is 100 mp5 as compared to the previous 50, I don't think that should be a problem. (By the way, I'm guessing a typo here but I just got it last night and haven't looked at the character tab to see the real differance.)

Again, thanks for the info.