What every BP breeder should own?

whole bunch of big ass fat normal girls and a 4+ gene male

All ball python morphs:gj:
Mostly anything you like and what you hope to produce in the future.
Me personally I like albinos, pied and hypos as my ress genes, and pastes lessers/butters, spiders, pins mojos, enchi, and fire or vanillas.

Can never go wrong with codoms but me I pefer the Pastels and Pastel Yellow bellies I had a 7y.o. pastelyb that has held most of his color and just a impressive snake (gave to brother for Bee project)

I'm a big fan in using supers. I'd rather have 1 super pastel female than 2 pastel females. You'll spend a little more for her versus 2 reg pastels, but you'll save in the long run. Half as much food, cleaning, and electricity. Plus you can't miss on the odds when you breed her, at least on the pastel aspect of the breeding.
As far as "must have" morphs, I'd have to say Pieds and BEL complex.

Yeah, that's actually what I came back to say: rather than breeding for supers, if you can, START with supers. I have a super mojave girl here, and omigosh, do I have plans for her... practically ANY male I pair will her will make gold. I just realized this week I can pair her with the black pastel and make black magics.... and that's just if I get bored, that's not even what I bought her for.

I've been missing a lot of 1-in-4 chance double-gene combos this year. Just because you pair a pastel and a spider, doesn't mean any of the babies will hatch out bumblebee... but having a super parent means everybody is at least guaranteed to be SOMETHING.