Rakdos is the best midrange color because it has both Bloodtithe Harvester and Fable to deal with the wrong half of the deck problem
Card draw is never a bad thing, so being able to do it when you want for such a low buy-in is worth the price of admission alone
Yes, 3 deck(s) using this combo are listed in the Decks with this combo section above
Jegantha, the Wellspring: Might be difficult to companion, but casts the commander for free and doubles up if Providence is already in play
Meanwhile, Gengar- EX does its tricks without any fear of being brought up and KOd (unless the opponent plays Pokmon Catcher and gets a heads)
This means setting up in a dark room, with an overhead light, a card mat, an empty slab, and Giovanni's card cleaning kit should be close by