I wonder if the deck being named 'fires' unfairly puts the focus on that card. It's certainly gravy but perhaps more useful to look at
The consistency of 8 mana dorks
Hard to deal with threats (chimeric idol, blastoderm, saproling burst)
Answers that are also threats (ftk, assault/battery, thornscape battlemage)
Ways to use excess mana (dust bowl)
Focus on curve.
These all lead to a focused, aggressive, proactive deck where the opponent is almost always on the back foot. Giving things haste just makes it that much worse for them and less time to defend appropriately. I think you might want to try to represent all these themes if you're looking to try to replicate something similar.
The consistency of 8 mana dorks
Hard to deal with threats (chimeric idol, blastoderm, saproling burst)
Answers that are also threats (ftk, assault/battery, thornscape battlemage)
Ways to use excess mana (dust bowl)
Focus on curve.
These all lead to a focused, aggressive, proactive deck where the opponent is almost always on the back foot. Giving things haste just makes it that much worse for them and less time to defend appropriately. I think you might want to try to represent all these themes if you're looking to try to replicate something similar.