a) Fate Eggs suck. Get rid of it
.
b) Improved Mutation... it's actually an interesting choice with the RoLs. Question though: Do you really have enough entropy to pay for both the mutation and antimatter? I haven't tried the deck, so maybe you do.
c) Going off that, antimatter is an awful lot to pay for with just the mark.
d) Oty is probably hard to pay for with only supernovas and cremations, too.
e) Quintessence > Phase Shield due to cost and your deck is a mostly speed deck anyway.
This is just going off conjecture; for the quanta questions, I'd at least consider them.
So... Here are my suggestions:
-1 Fate Egg
-1 Antimatter
-1 Otyugh
-1 Phase Shield
+1 Quintessence
+1 Lightning - still not using tons of aether, and it's a good control card
+1 Congeal - cheap and good control card, and can be used with the shockwave if you need to (situational combo though)
+1 Precognition/Flesh Recluse - more damage or more draws. Both are good choices.