That is a LOT of colors to be mixing, lol.
I'm assuming that when you say you don't want to breed pet quality ones, you're meaning you only want to breed for accepted colors?
Basically, if you want to keep from getting a bunch of mixed colors, keep your same colors together. There are a couple exceptions though.
Firstly, I have to ask, what's Apricot and what's Pastel to you? I'm not sure where you are, but from Apricot I would have assumed the UK, since that's what people in the UK call what we call Pastel in the US. But then you also said Pastel, so now I don't know, haha. I don't want to give advice and we get our wires crossed because we're calling colors by different names.
What I can tell you, though, is that black bibbed, blue bibbed, and silver bibbed can be bred together. You could also breed black bibbed and chocolate bibbed together.
Buffs I wouldn't breed with anything else, just other buffs.
Silvers - again we're running into a color name issue, because I don't know if you mean solid silver, as in two copies of blue dilution, or silver as in what people in the UK call what we in the US call Snowy.