Anyone have a Frost Mage Click-Castsequence?

[Ualaa]

I'm going with a mixed team, in battlegrounds.
So far I'm trying to build a mage click castsequence.

According to maxdps.com, the correct rotation is:
-- Summon Water Elemental
-- Frostbolt

Ideally, I'd like to work Icy Veins and Cold Snap into the rotation.
Possibly Focus Magic from Arcane as well.

When I put Summon Water Elemental or Icy Veins into a castsequence, it gets stuck on that spell and won't advance until the cooldown allows. I was going with:

/Click MultiBarRightButton1
/Click MultiBarRightButton2
/Click MultiBarRightButton3

On 1:
/castsequence [nopet] reset=combat Summon Water Elemental, Cold Snap,,

On 2:
/castsequence reset=combat Icy Veins,Null

On 3:
/cast [target=target, harm] [target=targettarget, harm] Frostbolt



Frostbolt has to be the last ability, because that's the fall-through spam.
The only solution I've got so far, is with modifier keys, which I'd like to avoid if possible, in a spam macro.
I have Water Elemental glyphed, so the cooldown is 120 seconds.

Anyone have any thoughts?