Unbuffed, my 39 Enhance Sham has around 2650HP/149SP in HP gear, and 2450HP/218SP in SP gear.... unbuffed. (Kings/Fort - over 3000HP)
I have somewheres around 3100mana.
I still get ~800+ crits with FrostShock sometimes, LB always hits for 400+... etc.
I like Enhance because of:
+10% INT
+5 crit
+10% HP
+30% SP/Heals on Flametongue/Earthliving.
-30% slows
instawolf
shock spell mana cost reduced 45%
improved water shield, I don't really go OOM that much.
I throw the other 5pts in Concussion.
I realize I'm using the spec for the complete opposite of what it was intended for, but it really works amazing with the 1H/Shield non-WF combo.
I tried full Elemental, and full Resto... I didn't like either of them. Was dying too quickly, was OOM too quickly. instawolf is one of my key kiting techniques, it really increases survivability. As well as chasing down flag carriers, you don't lose those precious few seconds.
But... all depends on your playstyle.