Summon Archfiend Emperor without tribute so that he is destroyed during the End Phase.
Use Call of the Archfiend to revive Archfiend Emperor while Discarding Yubel.
To remove Steelswarm Caller from your field you can tribute him to summon Yubel.
Let Yubel be destroyed every End Phase and revive her with Call of the Archfiend the every turn.
Use Recurring Nightmare to retrieve monsters from your graveyard and fuel the revival of Call of the Archfiend. When you run out of Fiend-type monsters and used up all your Recurring Nightmares, use Localized Tornado to return all cards in your graveyard back to deck. Do this during the Main Phase after you revived Yubel so that you will still have a Yubel in your graveyard during the End Phase.
Give Localized Tornado to your opponent with Graceful Tear. Your opponent would activate it before running out of cards, extending the duel.
Cyber Style Can be used each time your Life Points are at 3000 or below. Play 1 "Proto-Cyber Dragon" on from outside of your Deck for every 1000 Life Points below 4000. This skill can nly be used once per Duel.
I sort of combined everyone's suggestions here, with my own added flavor:
2x Doom Shaman
1x Fires of doomsday
2x Mystic box
2x Different Dimension Capsule
1x Sword of deep seated
2x Graceful tear
2x Localised Tornado
The end result is 2 Yubel summons/turn, keeping in mind that it's a draw after 50 turns.
Give your opponent 1 localised tornado, then feel free to use the 2nd one for yourself or sword of deep seated (which gets repetitive after a while)
Use Capsule to get what you need
Use Doom Shaman to summon Yubel from hand or GY
I just realised once you have 2 Yubel + 1 Shaman on the field you don't need Shaman, so you can remove WOD and add extra Yubel in there. Then use the second mystic box on Shaman and summon 3rd Yubel with Mausoleum (you should have enough health for that with 2x Graceful tear)
Quick tips for decks to farm this:
a) use a Zombie Il Blud (SR from Dawn of Destiny) deck with Zombie World to summon multiple Yubel's from the graveyard every turn, or
b) use The Creator (UR from Electric Overload) to summon Yubel from the graveyard every turn by discarding a card from your hand
- use Sword of Deep Seated on Yubel in both decks every turn to keep yourself from decking out since it returns to the top of your deck every turn when sent to the graveyard.