Castigators counts as

I read the Drukhari novels a while back and I thought it may be fun to convert some wraithguard into castigators. But what would I count them as?

Wraithguard, Wraithblades (Obviously) if you want to stick them in Drukhari only deatchments Grotesques, or if you want to stretch it Clawed Fiends.

Grotesques or clawed fiends if you want to stay Drukhari.

If you don't mind bringing a full detachment of CW you could use them as wraithblades in a vanguard detachment.

I have made some counts as Grotesques Castigators from Wraithblades with Dark Eldar and Slaanesh bits(also read the novels, they're awesome )
But sadly Botophucket messed up the uploads, going to relink them again via imgur later when my internet works again.

Edit: Found some pictures that work for now:

Marath- those are nice! That's what I am wanting to do.