I'd like to second Bluepants' feedback:

I recommend:
3xGrounding, 1xWrath of Air
3xTremor, 1xEarthbind
4xPoison Cleansining (probably need to add a disease in there for WotLK..)
4xSearing, then drop Nova/Magma as needed

I also recommend having a 3-key setup for the earth/water/air totems, leaving the fire last. One, it's not nearly as defensive as the others. Two, you can safely reapply all your totems with your fire elementals out.

I advocate using four separate keys so that cast sequencing never goofs up. I've been using U-I-O-P and J-K-L-; for my PvP and PvE totem loadouts. I have separate keys bound to 4xGrounding, 4xNova, 4xTremor and other important drops. The 4x Grounding key I use a lot in PvP after I'm engaged with casters. Yes, it eats the WoA, but it helps so much with survivability that it's worth it.