Hmm I can't say i completely Agree with Amishcellphone on this one ( lol )
As far as the farseer goes its kinda bad setup. I only use Doom on banshees due to there low strenght and if your going to us asinging spear I would mount him on a jetbike. But then again i always mount the farseer on a jetbike ( i swear by it ) So u don't have to listen to me.
If u want to add some CC Dudes i would go with a tooled out squad of banshees with a wave serpent. that way u can really get use out of doom and u'll be able to destroy and tac or termie squad quit succesfully.
As of the Wriathlord i'd drop the Wraithsword, waste of points.
And if you have and points left over ( its late i don't feel like doing math ) Add some Pathfinders or for your 1500 list maybe some Warp Spidars.
Toy with my idea's if u want. <