Thanks. Yes, the publication itself is of course the context for the set. But I'm looking for ways to select poems that contrast enough with each other to... 1) Show my range as a poet; 2) Make it more likely that at least one would meet an editor's requirements; 3) Satisfy "harmonious" in ways I haven't yet learned?
There's blogs on this subject of course, but most are too general to be of any value as criteria. At least that's how I've interpreted them. And there are so many ways to select poems for submission--subject, tone, levels of ambiguity, layers of meaning, and so on. In the past, I'd submit one poem to a literary magazine. It was either published or rejected, won the contest or lost. Things are different now.
And thanks for the term "set." Lots better than "packet"