I'd never heard of cyder before, does it really work?
As for whether or not you need af2add (or whatever it's called), why don't you just add it? It's not like it's such a hassle to add, and I don't know of any downsides to having it on. And even if cyder doesn't need it, you might want to use some other program that needs it in the future, so, might as well add it now.
Oh, btw, you only need it if you jailbroke it with blackra1n. Other jailbreak processes make that change during JB.