You have just given away your army for Throne of Skulls
Aha in all seriousness... I like your list, no Deathmarks with despair teks but I guess you have to cut something out for the chaos contingent!
I'd try and have more whip coils on the wraiths.. They just wreck stuff in combat when they strike first, and with only one you don't get their full potential. I'd make some points up by removing the 6th warrior in the ghost ark, and taking out a wraith, you can then afford another 4 whip coils and it makes them much more effective. You could then take out a single cultist to make room for one more whip coil..
Apart from that I like your list!