Personally, I'd try to run B/W. I think you have a lot of sneaky good creatures there. Use your fast creatures to overwhelm your opponent's removal with Angel of the Dawn, Pegasus, falcon and stag for evasion. Graveyard Marshal for endless string of zombies from graveyard. Pridemate can get huge.
Your blue has a great army of fliers and might be a better choice than white but I like to be a little more aggressive if I don't have great removal. Psychic Symbiont can be a great card in sealed.
Even though you have 3 good pieces of removal in red, not sure it's worth a 3rd color just for that with all the creatures you have to put pressure on them early.
I was not impressed with the green in your pool. To me, you have 3 cards better in any other color than your best in green.