Yep. Very large. First thing you can do to make it smaller: get rid of all non

or

cards.
-8 Quantum Pillar
-1 Short Sword
-1 Poison
-1 Earthquake
-1 Bone Wall
-1 Heal
-1 Nymph's Tears
-1 Dusk Mantle
Next, take out cards that don't work very well.
-1 Chaos Seed (You already have Demons and Lightning for control)
-1 Nova (Useless in a duo deck)
-2 Mutation
-1 Elf (You already have other damage sources)
-4 Spark (Weak and die quickly)
-2 Immortal
-1 Dimensional Shield
-1 Phase Dragon (Costs a lot, not much use in this deck)
-2 Fractal (Nothing to Fractal)
Now you're down to 29 cards!

What else to change?
I'd remove 1 Aether Pillar and add 2 Entropy Pillars to balance quanta usage better.
Hope this helped.