Firebolt will only increase the Vulture's stats by 1. That's why he's using Plague. Besides, the AI is really weak..
Yeah the AI uses firebolts, but if I were the one using that deck I'd replace the firebolts with rain of fires, then the vultures would gain hp very rapidly.
you know what, my post about the fire/death AI deck is off topic so here's something more on topic:
Changes I'd make to sofsam's deck:
Death Mark
12 Bone pillars
6 vultures
2 boneyards
2 skullsheild (for maligant cells)
1 Arsenic (or plain dagger, short sword)
4 plagues
3 aflatoxin
I haven't tested it (ain't got the cash), but things dont cost much so i edited 14 pillars to 12, 4 vultures to 6 (plagues will strengthen them), 2 bonewalls to 2 skull sheild , weapon, 3 boneyards to 2 (can be used with plagues too), and left the plague/aflatoxin quantities the same.
Still not tested, but I just took what I thought would work, so if anyone can test it and say if it works that would be great.