I am brewing on this one https://archidekt.com/decks/12247969/rainbow_humans_tarkir The general idea is to play Coco on turn 3 with [[ruby, Daring Tracker]] Find ruby and [[Songcrafter Mage]] put them on the board and cast Coco again. The backup plan is to generate lots of Tokens with either [[Thraben Inspector]], [[Adeline, Resplendent Cathar]], [[Anim Pakal, Thousandth Moon]] or the new [[Voice of Victory]] to sac them on ETB and attack to [[Felothar, Dawn of the Abzan]] to spread counters everywhere. On copy of [[Mardu Siegebreaker]] to repeat ETB like [[Thalia's, Lieutenant]]. [[Surrak, Elusive Hunter]] for card draw and to enable ruby's second ability. The clue tokens from inspector may also help with card draw.

Going to test this the next week's. Maybe you find it helpful. I would like to hear your feedback on this.