I agree with you on the OTP matter about tenipuri. that story is like a giant ball of love, and everybody can be paired with anybody, and since there's no emphasis on pairing, it seems hard to link two specific people in tenipuri world.

This can be argue with golden pair or shishitohri but this is more about the tenipuriverse giving a lot of fanservice and at the same time nothing deep and durable.

there's a lot of het OTP in your list ! I really like battousai/Tomoe and Kyo/tohru but they would be in my list (if ever I bother to make one one day) if it was a top 30 or 50.