A pretty cool-looking deck.

My first impression is that it's low on quanta. You definitely need more than 2 Quantum Pillars, especially considering that your Novas are unupped. 5 or 6 pillars are ideal. But what are you going to take out? Let's take a look at quanta usage.
4

2

4

6

4

6

+ Ablaze ability
4

+ Growth ability
2

4

6

4

2

Overall, you're high on

. This is what I would do:
-1 Graboid
-1 Deflagration
-1 Mind Flayer
-1 Reverse Time
+3 Quantum Pillar
+1 Lightning
I removed 1 card each from heavy elements to allow for 3 more pillars. You've lost a bit of creature control by dropping the Mind Flayer and Reverse Time, so I put in 1 more Lightning. 2

for 5 damage? Yes please!
As for the light cards... yes, they are weak, and I would take a Blessing instead.
-1 Holy Light
-1 Reflective Shield
-1 Shockwave
+1 Blessing
+1 Fog Shield
I got rid of the

cards to add a Blessing, but I had 1 less card and I still needed to add in a shield. Fog Shield is very useful because it's cheap and still blocks a lot, so I put it in. However,

was now heavy, so I dropped a Shockwave for an Arsenic, a very useful weapon. If you don't have an Arsenic, take another Quantum Pillar.
Hope this helps.
+1 Arsenic