I like some of the components of this non-standard build... the one hit shockwave+congeal combo is very effective against specific creatures, you can even stage it... I personally would say keep it atleast, one set simply because it's a useful counter to some cards that the standard counters don't do well with. The use of grav force is odd though to me, with momentums make it not that great of a creature counter, and although it represents the only defense you have, I wouldn't grav force yourself too much either, except in a clutch pull.
In this regard though, I would add an AoE, so +1 Thunderstorm +1 Rewind - 1 Shockwave - 1 Congeal - 1 grav force.
Instead of going for the much faster epivu, you're going for bigger creatures, sure it may be a bit slower, but hit harder and are harder for AoE to take out, definitely an advantage in that regard. However, on pure draw odds, you will want a fourth deja vu.
+1 deja vu.
Now you have some nice CC going, a counter to almost any beginning start present, a good chance to draw your base card, some nice speed. Your missing some defense though. - 1 blessing + 1 fog shield
Finally, you have two critical weaknesses left, sanctuary and weapons. you might want to think about a deflag... but that's more of a side board, we already took out one of your buffs, and for speed purposes you probably don't want to lose another or a qt.