Originally Posted by
Dblbaconator
If you don't already, get the Glyph of Healing Storm. A 5-stack Maelstrom heal will do double the healing, and should more than solve your healing issues.
The best way to get your health back out-of-combat is, believe it or not, going back into combat again. Mental Quickness does give you plenty of mana, but only if you're beating up things. You'll also build up stacks of MW, which will let you heal yourself faster (and better, if you have that glyph). Drop Healing Stream Totem when it's off cooldown if you're still having trouble, and don't be afraid of using damage reduction cooldowns.
Your situation will improve as you gain more gear; your mana pool won't increase, but your spell power will, making each heal worth more. Plus, you'll have a larger health pool so you'll survive longer.