I originally ran an all Khorne army, but quickly learned that mono god armies are very fickle. When I won it was a massacre, but when I lost I had my butt haded to me on a silver platter. All in all I figured that an all Khorne army has a 45-55% chance of winning. My best advice to make your list really nasty would be first drop skarbrand. I know he has a wicked cool story, but for 300 points he aint worth it. (also the fact your enemies get to re roll misses in close combat.)
I would suggest the following:
-blessing of the blood good (great for anti daemon hunters)
I think it will be to slow, your prince will come down and every lascannon will shoot it. What do you plane to come down first? And what is you back up plane if they dont? You should throw a chaos icon in there. I have had a few games with me daemons now and i have learned this. Get behind cover when you come down, in 1500 take 2 souldgrinders, taking a squad of 20 nurglings with chaos icon, drop them close'ish to the other side around cover. Bloodletters+skulltaker on jugger and fiends of slaanesh. The bloodcrushers are good for firstdrop too, but you would need more and a chaos icon. They will probly get shot quickly because the look scary.
Fiends are your best friend if you cna get them into combat. A squad of them should clear the kill zone, leaving no attacks back, then in your apponents assult phase you will clear the kill zone before he gets a chance to attack and if you dont sweeping advance them then use hit and run and leave assult. chaos daemons are a 5th ed. army so they will get better when the new rules come out.