ill test your or a similar entropy-fire deck next, tested the last hours the poison-red deck and i think its great! i love it!
im testing atm using a single bonewall instead of the fire shield, not sure about that.
My experience, I tried using Bonewall and it didn't work. Death strat is: A) play Aresenic before Poison & B) play poison ASAP. In 9/10 games it'll be over before you manage to save up another 7 death quanta after you play all your poison cards.
Fire/Entropy I think has promise but I disagree on the small creature spam strat. We gotta be sure we get the most out of our choice of mark and picking darkness mark to support only two Werewolves isn't effective.
For mono fire I've played that decktype a lot and I like to run 4x or 5x Dragons. This is a very flexible deck.
I tried the Earth/Fire deck and I found that without an early Earthquake the Golems feel really flimsy. I tried versions with mark of Earth and added Rage Pots for extra control and that seemed to help. EQ is a powerful card in this format so we should try to take advantage but I feel it works best in a deck with other control cards to lock down anything the opponent does manage to get out.
Here's some other ideas I've been toying with:
Fire/Aether control with Phase Shields.
Fire/Aether aggro with Lightning & Quintessence.
Fire/Time with Reverse Times.
Fire/Water with Freeze/Ice Shield.
Fire/Darkness with Devourers.