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Yeah thanks for a lecture. But with this threat, I rather intended to explore the collective mind of this community on game mechanisms and more gamey tactics to add to my repertoire. Would you have any contribution within those lines?

This won't help to fix the celibacy problem that already exists, but If you want gamey tactics:
1) Make sure you have Free Investiture.
2) When asked for a coronation the pope will request you implement Papal Investiture.
3) Agree to the demand.
4) Enjoy being crowned by the pope.
5) After each succession the first thing you do is switch back to Free Investiture.
6) Keep repeating steps 2-6.