HQ's, IMO, you have too many points tied up in here, I suggest only 1 lord and a daemon prince...these guys don't offer too much to the army in general.
Termies only need 1 chainfist, and if they are footslogging then the ICON of slaanesh won't be needed, as ppl will just avoid them easily.
Dread is a 'meh'
CSM's need some special weapons and/or champions with special weapons...otherwise they are a waste.
Noise marines are ok, but escalation would serve to screw up this organization.
IMO, you'd be better with a variety of sonic blasters, blast master is best when stationary...which this squad is most likely NOT to do.
Raptors at this size don't need IoS, they should NOT be in combat, they should have a role, and compliment that role with 2 special weapons... meltas or flamers.
Again the bikers are the same, meltas or flamers, not IoS, not in combat.
Havocs, have to many weapons, 4 is max... usually autocannons would be better, as lascannons are too expensive.
Obliterators are fine.
My 7 Cents.