Sheesh! I didn't realise people hated Tzeentch this much
I've never even considered NOT adding Blue Horrors for Battleshock tests, Counts as Slain I could never interpret as anything other than the models being slain. I mean... for me that would be like someone saying they're trying to figure out how many Blue Horrors to buy so they're proxying them with these blue marbles, they count as blue horrors, only for me to turn round and say counts as? so they're NOT blue Horrors, got it. Odd. I'd certainly be offended to be called a cheater in this case.
To clarify where i'm coming from I've also only ever won one game with my Tzeentch army because I play with the models I like, so clearly not a WAAC player and I've also never considered NOT putting all the units in a Battalion down at the same time either, and it turns out it's pretty clear you can do that... Maybe i'm just not very good at rules, or the game full stop!