I am not good on Yubel decks, but here's some tips:
1. Have a Deck that let's you summon monsters, or else Yubel will die quickly
2. Mystic Tomatoes are really needed since they let you summon Yubel the turn they are destroyed
3. DO NOT kill Yubel with her own Effect, since that will just suck.
Hope you can make a little of the deck with these tips