Time Reversal is okay but it gives opponents a boost in cards (sometimes). I would suggest Elixer of Immortality because it is very cheap to cast and activate. It goes nicely with Trinket Mage which I notice you've left out. But that is something to think about if you ever want to include Trinket Mage.
Nice deck though, I really enjoy u/w flicker. It is probably my favorite deck in EDH. I run more of a ramp/combo version with Rasputin Dreamweaver at the helm. The principle remains the same though. I normally play control in the early game.
I have a couple of questions. How has Lone Missionary been for you? I'm currently running Wall of Omens in the 'defense from early aggro' slot. I normally play 3 to 4 player multiplayer pods though, so maybe the life is better then the card on MTGO?