I used this firestall to kill him today
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It's quite funny, as my Fahrenheit alone killed him. I didn't even need any fire bolts. Personally, I find this deck better than the mono aether with dragons, as the dragons and immortals will get stopped by the turtle shield every other turn while your Fahrenheit continuously smacks him around for more and more damage.
Deck in the OP is meant for people with no rares, so no Fahrenheit. I do think Fire/Aether stall is probably better than the mono deck in the OP though.
I only added the Fahrenheit and fire lance because I happened to have them. It works nearly as great with just 6 fire bolts, 6 dim shields, 5 aether pillars, and 13 fire pillars.
I find the fire bolt stall is better than mono aether against some gods because some FGs have shields like permafrost and turtle which slow down your invincible creatures completely. No shield can stop your quanta gathering.
Lionheart isn't that hard either, he constantly decks himself out, so if you can, you can even outstall him. (Protip: Having 10 hourglasses in your deck as well as quinting all your creatures is not a good idea)