Circle of Healing, and Prayer of Mending.
These are awesome. Glyph both (the former for raid healing). And low mana cost. PoM provides and instant 20ish K on the tank, and should almost be used on CD (for it will bounce around party/raid members healing them). I normally CoH a the first sign of damage on anyone other then the tank, then hit renew. I'm a big fan or renew filler so I talent it to full.
My priest is sitting at about 360ish ilevel and I will oom on the panter boss, with bad healers but I can heal normal baleroc without a problem.
If anything set down lightwell for yourself.
TL;DR PoM > CoH > Renew as filler
[Today 06:48 PM] Ion:swimming in a natural body of water ISN'T acceptable...it's momentarily tolerable