Lord Commissar - 80 points
Carapace armour
Veteran squad - 175 points
3x meltas
Lascannon
Chimera
Veteran squad- 175 points
3x meltas
Lascannon
Chimera
Leman russ - 185 points
Main battle tank
Lascannon
Heavy bolter sponsons
Leman russ - 185 points
Main battle tank
Lascannon
Heavy bolter sponsons
Leman russ - 200 points
Demolisher cannon
Lascannon
Heavy bolter sponsons
1000 exactly
Here is my list:
green units are turn 1 demonic assaulting.
Herald of Tzeentch
Chariot
Master of sorcery
breath of Chaos
110
Herald of Khorne
juggernaut
might
blessing
125
20 pink horrors
changeling
345
10 bloodletters
160
3 Flamers
105
Demon Prince of Slaanesh
Pavane of Slaanesh
Iron Hide
150
The bloodletters and the herald are attached to each other and are the counter-assault.
The herald of Tzeentch does what he wants. I was going to give him bolt, but I don't need to include any anti-tank, so I went for Breath. I was thinking about removing We Are legion, but if I kill a unit outright, WaL will still help with re-directing my fire to another unit. Thoughts?
The pink horrors are mostly a deathstar. I will deepstrike them a bit far away so the enemy cannot tie them up in combat, passively saving his skin from being wrecked by the IG heavy support cannons.
The demon prince is for the epic pavane that will synergize so awesomely with the battle cannons. >:D
the flamers are the suicide unit, obviously.

I will also hide the khorne units behind the tanks. They will deepstrike somewhere safe!
as will the demon prince...
If you think anything needs changing, or if I should toss in some bolts for good measure, let me know.
Hopefully my partner will come in and post his tactics as well.
also posted this in the chaos demons section.