I dont believe Shuppet and Uxie Donk will survive because of the increase in Sableye and Spiritomb being played, making it really difficult to pull off the proper donk strategy, but people have made things work when they face major adversities (Im looking at you post-Felicitys, pre-Junk Arm Gyarados)
Demonic Tutor in the command zone is scary, even if it's 5 mana and demands a sacrifice
It is still a creature spell, of that name, with the CMC of the original card (not the mutate cost)
If you do find your Abundant Growth, you will only be able to play it turn one if your opening hand has one of the following: - A Command Tower - A Forest, 3/39 lands in your deck are forests - An Exotic Orchard and hope the mono green player ahead of you in turn rotation didnt keep a colorless land - A Murmuring Bosk - which will only enter untapped if you also have your one treefolk card in your deck in your opening hand (Faeburrow Elder)
While the top two spots may swap back and forth given the incredibly similar values, one thing is certain: Charizard is safely at the top of the list