UWR allies 2.0 Post alara

new type im testing with the leyline. ajanis help heaps. the sea gate is there incase i need draw, dont really depend on him. the one jace is there cause its blue and i pulled it out off a pack. (and its foil). idea is to hold mana leak once they hit 4 lands and try to keep 2 mana open to counter a board sweeper. i have doj incase they are too fast. then i hold back. wipe board. and start dropping crap. i splased red for the battlesingers cause those things are insane.any suggestions on sideboard needed. thanks. the sideboard: 2 celestial purge - black red permanents planes walkers 3 oblivion ring - planes walkers 2 kor firewalker - red deck wins 3 spreading seas - land screw 2 combust - uw fat threats 3 mana leak - stop combos and destructive force, etc.