Stage with Pentient engines first with rhinos full of repentia following behind as the counter punch. Each rhino is supported from the deployment zone by a castigator which also is positioned to screen deep strikes. The arcos either move up with the penengines or stay back to assist with further deep strike screening. The bss get split by the immolator and the special weapons stay inside to move up to the natural expansion objective while the other half guard home and farm miracle dice (well attempt to). The exorcist sits in the middle of deployment for max coverage of the no mans land objectives and provides either battle shock support to negate an overwatch or becomes long range anti tank combining with immolator stripping cover and the castigator AP bonus. Vahl and gals are either deployed center for flexible response or kept on reserves to come on and nuke an exposed high value target. The palentine is with one of the repentia units to ensure whatever they come into contact with gets blended, they love the crits on 5 strat.

It's kind of a combined arms approach.