Partner was an "intermediate pickup partner" with some of the usual "tools", including "learning Micheals and negative doubles".
I think I went a bit awry here. In retrospect, expecting 5N to be recognized as "pick a slam" was probably wrong. Partner with a balanced hand consistent with her bid passed.
Fortunately my RHO chose to double bringing us back to life. She had already helped in my decision to reach a slam by bidding 4♥.
The other options I considered were the obvious 4♠ or 5♥ control bid, unilaterally bidding 6♦, and bidding 6♣ hoping for that to be right or be corrected to 6♦s.
So based only on the limited information available to you about your partner - her bidding and play was consistent with description to that point - What would you do?