[The Horror in the Shadows]

librarian with jump pack can be a great addition to the assault squad or by himself and create havoc esp. when he has might of heroes.

As you already have a good amount of scouts, have you thought about scout bikers. I field a 5x man squad of them and never fails to amaze me that nearly all my opp. take one look at them and dismiss them only to have them appear later on and do some serious damage to their plans.Yes they cant have special wepons and have a 4+ save, but you can still upgrade the sarge and with their scout rule they can (if u get the first turn) move them 30".

I agree with DeAd CoMmAdO about the preds, great allround tank