Your second deck seems a lot better, but you still have the simple problem that you have no shield that blocks the 1 damage that malignant cells damage after you completely fill up their side of the field. I'd change at least 1 thorn carapace out for a skull shield or an emerald shield so you don't have to worry about damage anymore. Also, to really get the full effect of the vultures + afla combo you should probably add a couple of plagues and maybe a mitosis while decreasing the size of your initial vultures to fill your own side with vultures while they get filled with malignant cells. So, we should probably add 2-3 plagues and 1-2 mitosis while -1 or 2 vultures also, -1 thorn carapace +1 skull shield/emerald shield.
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52g 52g 52g 52g 52g 52k 52k 52k 52l 52p 52p 52p 52s 52s 52s 52s 52s 542 542 542 542 542 542 542 542 542 542 5c2 5c2 5c2 5c2 5c2 5c3 5c3 5c3 5c9 5c9 8pn
So, we've taken care of that, but what if they play a creatureless deck? We still want damage, right? So, lets add an arsenic or two as well for constant damage.
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52g 52g 52g 52g 52g 52k 52k 52k 52l 52p 52p 52q 52q 52s 52s 52s 52s 52s 542 542 542 542 542 542 542 542 542 542 5c2 5c2 5c2 5c2 5c2 5c3 5c3 5c3 5c9 8pn
Still a great idea I would like to see you complete =]