Well lately i have noticed that it´s very very hard for me to keep my teammates alive in heroic dungeons, though i have 347 ilevel.
Im doing something wrong i can feel that, but i dont really know what, players hp just drops more then i can heal.
Im normaly using spells as every shaman out there, I keep my ripitide up all the time on players and ill spam healing wave when they have 60 % > of their HP, im using healing surge when they are < 60 % and GHW When they are really gonna die etc..
This is my armory; not possible to link it, but if you wish to check it out, visit wow eu and the name of my shaman is Tríxxy ,Outland
take a look and see if i may have some trouble with the stats or anything you may think i should change.