If you can Fusion Summon twice in one turn, you're likely going to win that turn, as it's a mixture of multiple pops and 3-4 swings of 2500/2600
No, not because of Damping Sphere -- nobody but Seth would run that -- but more the fact that any non-green deck is going to be running lots of mana rocks by necessity, so blowing them up can really slow them down, which means they'll be slower to respond to your combo turn
Raidraptor Rising Rebellion Falcon Coming slightly out of left field, Raidraptor Rising Rebellion Falcon is a strong XYZ choice for Raidraptor and Rebellion decks, and by extension Odd-Eyes and XYZ Dragon decks
With a mere Pikachu pre-evolution, Alolan Raichu Ex is a deadly force that can be easily paired with any strategy
This doesn't replace Craterhood in decks that have it but it could either supplement it or serve as a decent alternative in decks that don't