Rate/Fix my Yubel Deck?

If I were you, the only thing your yubel deck needs is more cards that destroy monsters on your side of the field to activate special effect. Keep in mind the difference between tributing and destroying. Look into dark hole, it's legal now, and you can kill all your opponent's monsters, and your yubel. Maybe try running a two-pronged attack as well. One of the best cards to use in a yubel deck is savage colliseum, you can force your enemies to attack or die, while also getting 300 life points a turn, because yubel can attack without fear of taking damage. A Yubel deck is a great way to murder opponents. Beware of skill drain and removal cards!