I would run 3 color Enchantress, RUG, mainly utilizing the combo of Mana Flare-Candelabra-Hurkylls Recall-Fireball. Enchantress with Sylvan Library, Wild Growths, Dance of the Many, Clones, Copy Artifact, and Control Magic. Essentially UG enchantress with red just for Mana Flare and X burn spells, and SB hate like Earthquake, Bloodmoon, REB, shatter, and Stone Rain.
Currently I'm a big fan of MirrorBall. Mirror Universe is my favourite card in this format, it's so cool. I've been trying to put together a combo/control deck which utilizes a Mirror Universe/Fireball kill. I play under Eternal Central rules so I can deal damage to myself with mana burn if I need to.
I am usually playing a Buw deck : Juzam, hypnotic, and serendib, with the usual tools around that core. It is a quite solid deck with a weakness against red decks. My favorite cards are Juzam (for obvious reasons) and Icy manipulator because it is the greatest toolbox ever !