It looks like a pretty good mono fire deck. I'm sure there are others that are more experienced with a fire deck, but I'd consider dropping the Ash Eaters for Deflagration to get rid of those annoying Shields (especially Procrastination and Ice Shields). If you have the money, replacing the Fire Spirits and Fire mark with Lava Golems and an Earth mark would probably be faster at killing AI3 as well. Maybe something like this:
I haven't thoroughly vetted this deck, but it should work well for AI3 (this is designed for AI3, you should probably change it if you plan on doing PvP or t50). You might need to tweak the ratio of cards. Have fun.
PS: Don't spend too much money on this. If you're winning 90+% of the time with your current deck, stick with it and save up your money for a Rainbow false god deck.
