I have the same setup, and I just use the following:

The ` key is my (nearly) all in one tanking macro, appropriately named "Kill", which includes

#showtooltip
/castsequence reset=6/combat/target Icy Touch, Plague Strike, Scourge Strike, Pestilence, Obliterate, Blood Boil, Death Coil, Scourge Strike, Death Coil, Scourge Strike, Scourge Strike, Death Coil
All the close number keys are shaman DPS, F1 = all shammies do lesser heal on tank (takes her to full in 2 secs), F2= chain heal shammies, F3 = one shammie heals my ghoul.

I use a G11 keyboard, so the side keys are for clone movement (top 6), totems and buffs (middle 6), bottom 6 is hex and taunt macros. So, mainly a fight for me is spamming ` and hitting whatever cooldown is up on shammies, keeping flame shock up with "G" and lavabursting whenever it's up. Y is magmas for AoE. I have a lot of other bindings, but that should get ya started