I've experimented with allowing page-breaks only after full stanzas. I found that it only makes sense for very short stanzas, 4 verses at the absolute max (personally, I think 4 is too many already), because it will leave you with a lot of white space at the bottom of the page - which I personally don't like at all when it isn't the end of the poem. Lots of printed poetry books have page breaks inside stanzas, so why shouldn't ebooks?
And the best thing to do if you're really trying to figure out how to format poetry - download some poetry books from the MR library and reverse-engineer any formattings you might like.
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