That deck STARVES quanta.
I'd recommend...
-10 Emerald Pillar
-5 Bone Pillar
+15 Life Pendulum
Reason: Pendulums are much more effective in duo decks. Some Bone Pillars stay because of the need.
-1 Bone Dragon
Reason: Does next to nothing.
-1 Jade Staff
Reason: You don't need two different weapons in a deck.
-1 Skull Shield
Reason: Even when not blocking damage, a Thorn Carapace is much more effective at terminating creatures.
+1 Arsenic
Reason: Having one of these does next to nothing in terms of gettng the card. Besides, it's useful.
-3 Shard of Gratitude
Reason: They do next to nothing due to the fact that they're only effective when having a Mark of Life. But that's not the case.
+1 Thorn Carapace
Reason: It's effectiveness surpasses that of Skull Shield's. Do not play it when you have a Bone Wall up!
-2 Heal
Reason: Empathic Bond + Aflatoxin should give enough healing. Perhaps they could work early game, but the deck is too big.
-3 Soul Catcher
+3 Aflatoxin
Reason: If you're wanting to combo Aflatoxin, you might want to have many of the card. Soul Catcher is a candidate for elimination.
+2 Virus
Reason: You need fodder for Aflatoxin, no?
+1 Bone Wall
+1 Boneyard
+2 Plague
Reason: A deck this big needs support. These cards are best, plus Plague for effectivity.
You lack damage at a max of 1 per creature, but as a 60 card deck this has deckout winning as an option.
Fire Shield or mass CC are a terminal danger, as those will shut you down good(but you'll get a huge Bone Wall!)