Normally you can't have the same caster twice in a pairing, is that intentional?
You should definitely play the Banes. This list will be slow and relies on high ARM (16 + Unyielding + Death Pact + feat) and boxes to survive, Banes laugh at that. Using Death Ride with Darragh will help give you an edge in threat ranges. You also won't be giving him souls. If you leverage your Bane Knights well, you should be able to limit the amount of models he will revive.
Be sure to not overcommit, because his multiple attacks + Mortality will make short work of you. Basically, you can grind it out and threaten to assassinate if push comes to shove.
EDIT: be careful not to get assassinated by Incorporeal Posse on the feat turn.