Frost Death Knight - ability spams :)

Having had to reload my PC and lose my WOW, I'm going to have to create my ISBoxer bindings from scratch.

I'm trying to remember what I had setup, whilst trying to improve...

To start I'm going to have a new 'switch' system, so I always spam the space bar (not various other keys)
SPACE - Ability Spam
Z,X,C - Ability Switch

Z (Ranged) - Spam Howling Blast, Death Coil
X (Burst) - Spam Obliterate, Heart Strike, Frost Strike (after 10 seconds activate empower rune weapon)
C (Anti Caster/Heal) - Spam Necrotic Strike, Heart Strike, Howling Blast, Frost Strike (??)

# removed self heal death strike - I'm using paladin.. so don't think it'll be a good option #

I have other procs during the DPS spam including blood tap.

How could I improve on these?

here is the one that i based most of my setup on.

Seems to work really well

http://www.dual-boxing.com/showthrea...ighlight=Frost

This is what I threw together

http://privatepaste.com/860a92e1ff

all abilities laid out as macros - I don't have anything on my DK toolbars.