Go for the formation with Large Blast webway portal.
When you play normal games you expect certain units to fullfill certain roles, like do damage, hold territory, hold units in assault. In Apoc entire formations or even players armies expected to do just that.
Joe hold territory there, while Matt atack enemy forces. Be very concentrated when building your force, it isnt take all comers, it supposed to do something very certain and you and your allies must decide what it will be.
By the look of your force you must fill atacker role - appear at some point and do critical damage. Likely thats 2 formations of Kabalite Web Strike. Everything is rerolling to hit on turn it appears. I'd get some freakshow stuff also, archangel of pain and armor of misery.
You then should decide if you atack at first turn or later turn. Webway portals should be placed at the beginning of the game, so you could use them as scare factor.
Generally speaking - in Apoc DE is alpha strike force that is coming in hard and fast and it either do what its suppose to do or die in that very turn it appeared.
In 5th you could also use those portals as way to enter reserve with other fomrations and units, you should look rules now i dont know if that is still worded to allow that, with change to webway portal in 7th book.
The Dance of Death begins - embraces, caresses, and kisses,
The Harlequin loves you as you fall over in pieces!