Why 10 CSM for? Add in the 10th and get yourself that 2nd special weap.
Raptors don't need to be in squads of 10. Take them in units of 5 with 2 x meltaguns and then deep strike them and use them as a melta suicide unit - much cheaper and still affective ;)
That single land raider is going to be a easy target being the only big piece of armour. You need two for daul threat tbh, however chaos 'raiders aren't that good. I'd rather deep strike my chaos terminators and throw on MoT for extra invulnerable save.
Drop the predator and take double obliterator units.
You can take the land raider as dedicated transport for the chaos terminators, why would be it insanely broken for?