[quote=@IncredibleBee]
For the servant, I got one or two in mind that wouldn't use NPs. Since it's running off a false grail, he'd have to have a low mana cost to be viable. So I'm thinking of a few that can get by on normal combat skills, without relying on some crazy special attack.

I'm also thinking that since this may qualify as a fake class, he'd forego class skills, if that's what you mean by nerf. But I think I could get by without them.
[/quote]

It being in a Class Container is fine. If you'll be removing a Noble Phantasm, then unless the Personal Skills are just absurd, the only other thing you'll really need to do is lower Class Skills by a rank, in all likelihood. 

You'll basically need the lowest maintenance cost ever, since you won't have Grail Support, which is important as I was explaining yesterday. If the rest of the cult is helping maintain it, that'll help.