1850 Null Deploy Freakshow (with Wyches for some reason)

Dark Artisan: 375pts
Haemonculus + Webway Portal + Scissorhand
Talos + Ichor Injector + Twin-linked Heat Lance
Cronos + Spirit Probe

Scalpel Squadron: 260pts
5 Wracks + Ossefactor
5 Wracks + Ossefactor
Venom + Splinter Cannon
Venom + Splinter Cannon

Cast of Players: 253
Troupe + 2 Kisses + 1 Caress + Haywire Grenades
Death Jester
Shadowseer + Mask of Secrets

DE Combined Arms Detachment: 960
Succubus + Archite Glaive + Armor of Misery + Haywire Grenades
6 Wyches + Hekatrix + Agonizer + Haywire Grenades
6 Wyches + Hekatrix + Agonizer + Haywire Grenades
Raider + Dark Lance
Raider + Dark Lance
Raider + Dark Lance (third one for the Cast of Players)
Razorwing + Dark Lances
Razorwing + Dark Lances
Voidraven

1848 pts total. Things I've considered were shock prows for the Raiders to take advantage of Tank Shock with -6LD, and Mastery 2 for the Shadowseer (though with lack of experience using psykers this edition, I don't know how important that actually is). The general game plan is to go second and Deep Strike everything. Hit the scariest thing with Psychic Shriek at -6LD, try to run things off the table by forcing morale tests with the aircraft, and shower everything with Haywire Grenades before charging in on Turn 3. I also like FW's Reaper, but with its lack of Deep Strike and only a 24" range on its anti-tank fire mode, I'm not sure how useful that'd be to really smash something the turn they come onto the board. Its 36" pinning effect would be good for getting into melee, but I'm not sure it's worth dropping the aircraft for them as well as some Reavers to shield them. I'm also amused by the thought of getting Fighter Ace on the Voidraven (+1BS is good for anti-tank work, 180* rotation is good for making sure the bomb is as threatening as possible, and the Hatred bubble would be good for all the non-Harlequin infantry).

Any advice on the list one way or the other?

Don't you need chain snares for tank shock and shock prow for ramming?

Shock Prow allows both, actually. I think ramming is cool and would tentatively be willing to pay the 5 points extra to have the option if I go with them. Though, for the price of 3 prows, I could get snares on everything, including the Wrack venoms, and have 5pts left over.