How I play the deck depends on what type of deck I'm playing against and what the opponent has in their hand. With the Precognitions, I'm able to decide if I should drop a Deja Vu right away, or wait. I usually try to buff with at least one Blessing and one Unstoppable, so the Deja Vu is a 6/6 with Momentum. If I get more buffs, I'll play them before splitting, and if I can wait long enough, I will so that I can get some bigger creatures or more Twin Universes. The deck requires a bit of strategy to play, and knowledge of the metagame and mechanics of the opponent's deck in general.
If I don't draw what I need, when I need it, then the deck fails miserably. Even more so against mono-fire, mono-dark (or anything with Devourers/Pests), and speed poison. I just made it for fun, and of course, the win rate may not be that great, but it's hilarious to play, and is probably the best form of a Deja Vu deck that I've seen so far.