i was thinking of something like that. the guys that i had shown is what i had already bought. but the list i came up with was:
Chaos Lord - 140 pts
Jump pack
dual lightning claws
Great choice as long as he has support
Chaos Space Marines [x10] - 285 pts
Aspiring Champion
Icon of Nurgle
Plasma Pistol
Power Fist
Meltagun
Heavy Bolter
These guys are all over the place. Plasma on champs are a bad idea normally. If you really think you need the extra firepower, keep it, but if it overheats it will kill your champ (and thats a lot of points). Give these guys some direction. Meltagun is an assualt weapon and the Heavy Bolter is obviously heavy. If you want these guys to move forward every turn you won't ever shoot the heavy bolter. If you want to use them as a fire base drop the melta gun because it won't be used.
Possessed chaos space marines [x5] - 190 pts
Aspiring Champion
Icon of nurgle
Most people seem to hate possessed, but they can definately do some damage. I would definately drop the IoN though, its way too many points to only effect 5 men. I would go with a Icon of Chaos Glory or nothing here.
Khorne Berzerkers [x12] - 282 pts
Skull Champion
Power weapon
Great choice here. These guys are one of the nastiest cc units in the game. The power weapon is definately the best choice for them as well, but you may want to add Melta Bombs to the champ so they have a better chance if the end up assaulted by a walker.
Plague Marines [x10] - 300 pts
Plague Champion
PLasma pistol
power weapon
plasma gun
Meltagun
Again, plasma on champ, bad idea. The plasma gun and Meltagun are compatible with each other, but you may see more use doubling up with one or the other. I would definately give the champ a power fist though. Plague Marines go at initiative 3 which is lower than most armies you will come against anyway, so a Power Fist is a great choice for these guys.
Chaos Raptors [x5] - 150 pts
Aspiring champion
Dual lightning claws
meltagun
I love Raptors, but I wouldn't run this few. These guys (I'm assuming) are going to escort your Lord into battle. They need to be able to hold up to a good bit of firepower (people will be afraid of that lord). I would throw some more numbers into this squad and probably give them another melta. Either way, I would at least add an Icon of Chaos Glory.
Obliterator cult [x2] - 150 pts
Not my favorite choice, but you've got plenty of melta's in this list and these guys should clean up whats left.
Not sure if everything on this list is viable/legal/good/balanced but it looks decent from what i came up with
Hope that helps. Good luck with the list.