After a while, you'll get an idea of what you need most often.
If nothing else, having one each of the "oddball" sizes will cover you.
Not sure how frequently you'll re-order, but if somewhat frequently, setting a bike aside while waiting for an oddball may not be a big deal.

When I was flipping bikes, mostly late 80's early 90's vintage, I seemed to use a lot of 122 & 127's.