Daemon Prince, Tzeen, Doombolt, Warptime -> 165
Wings would be really handy to help this guy get into combat and optimal firing positions.
Terminators (4 + champ), Mark of Khorne -> 190
There's really no need for the Icon of Khorne when you can just take another Terminator for the same points. You'll get a couple less attacks but you'll also have more models in the unit which is always a good thing.
Thousand Sons (10) -> 230
Remember that Aspiring Sorcerers are mandatory.
Chaos Space Marines (9 + champ), Heavy Bolter + Personal Icon -> 205
The champ should have at least a power weapon and another model should probably have something like a plasma gun.
Khorne Bezerkers (9 + Champ), Powerfist + Melta bombs -> 255
Chaos Havocs (10), Lascannon, Missile Launcher, Autocannon, Heavy Bolter ->240
I'd swap the autocannon and heavy bolter out for more missile launchers.
Chaos Predator, Autocannon, Sponson Heavy Bolters, Daemonic Poss -> 120
Daemonic Possession isn't a great choice for Predators. They badly need their normal Ballistic Skill.
Rhino (Thousand Sons), Havoc Launcher -> 50
Rhino (Khorne Berzerker), Dozer Blade -> 40
Nice. I'm a big fan of the havoc launchers. Good choices.
Best of luck!