For your sideboard i'd consider some removal, maybe Doomblade or Ultimate Price ? Also if you have the (stupid amount of) money for Thoughtseize , thats a good shout too. Maybe add some backup cards, they start overwhelming you, Cyclonic Rift ? or Disperse style cards? Unsure, depends how you aim to make your sideboard, i always base mine around What If's...I love the idea of this deck, would obliterate my standard easily... +1 from me!

@SeanLandDGeorge Yeah I did find that when Agent of the Fates isn't out yet, I'm in need of some removals, but once agent is out, the opposing field is pretty empty as they are scared to play non-haste creatures. I definitely want Thoughtseize or Duress to get rid of planeswalkers and board wipe spells though. Good suggestions :) will try get some Cyclonic Rift and see how often it can save me haha.

@pandith: I tested Erebos, God of the Dead , in this deck he doesn't make immediate impact, I find that I just sac 2 life to draw so I've gone for Bident of Thassa now since my rogues' hits can net me card draws :) thank you still though, wouldn't have tried bident if you didn't suggest erebos first!