I don't know if I'm doing anything wrong, but I feel that even with around 2700-3000 Spirit I go OOM fairly often in our 10 man raids as Holy. Obviously it could be due to the fact that I need to heal people taking more damage than absolutely avoidable (everyone makes mistakes) but I try to stay away from Flash Heal and Greater Heal no matter what (unless SoL procs of course).
To me it just seems that it is almost absolutely necessary to always have a Resto Shaman in the group as well, which, while in a 25 man raiding situation you should never have a problem with, but in a 10 man one, can be a little dicey.
Just curious if anyone else is having some mana issues in their 10 man groups or if anyone has any suggestions (aside from "DERP GET BETTER GEAR NOOB")