Well, the general idea with the FL vamp is to take the necromantic lore, raising spirit host in the first turn or zombies to block line of site if possible with warmachines. With Ghoulkin/vanhels(in three places) this is a definate possibility, and for march blocking i tend to use the lynci vampire and the varghulf(on his way to more destructive objectives). On top of this i don't have fell bat models
Also, don't you guys find that corpse carts are the first target of armies with there war machines, as in turn 3/4 the ASF can be punishing (especially when they're more focussed on other bounds) as well as the ever annoying stacked balefire. The
necro allows them to be joined to units which in turn offers extra protection for one of the beauts.
Oh and i missed out the periapt in the new list, which will be replacing the sword of battle on the Lv 2.
One thing i haven't really mentionned until this post is how the army will function, which i guess is an integral part in the understanding of the army list, and even more important for it to be criticized.
The basic idea with ghoulkin is to offer too many targets initially and hopefully to overcome. With units of ghouls (even at the initial size of 10) i'm confident that it could weather 2 bolt throwers, which is usual for tournament lists... the dwarven firing line would be different, but that's where the tactic detailed above with raising/blocking comes in, particularly with SH.
The varghulf acts as a mop once the WM are blocked (if zombies/ SH cant cope) or as a flanking beast to add dynamic combat res to ghoul fights. He's also a handy terror bomb for low ld armies.
The wraiths have a simular function, and also are there to protect the lords unit should a star dragon HE Lord appear... nullstone? Screw you!

, also they're to get behind units for either the rear charge or cross fire kills.
The Direwolves are included as they are handy for capturing tokens and buggering off. They are also used as rear runners for crossfire like the wraiths.
That's about all that i can think of right now, with it being so early
Sorry for being so adamant with the
Necro, but too often have i seen my Corpse carts fall to enemy fire, which then expose my ethereal units and charges from various nasties...