@Cal I think you've seen me rant enough about it, and might have even checked out the Note within the blog, but I'll do my best to explain it again. Just for you, buddy
I've had a thorough discussion with Executor on Sonic's Fate Manip. You can even check it out yourself if you want. He essentially said that Sonic's Fate Manip is unpredictable and he couldn't see it used in a combat scenario. He then clarified that he thinks it's competely combat applicable, but it's hard to explain
how it would come into play. That's why he avoids talking about it in a VS scenario, like with our fellow Digimon here.
He said it could manifest as using just the ability he needs, raising the "chance" of him using the move that secures him a victory (and he said it's apparently happened like that before). Or it could work by making him grow in strength from a deadly attack instead of dying (which has also happened once or twice before). It tips the scales in his favor because he's the Embodiment of Chaos, and he's always had it in his favor due to this. So the small chance of him winning, as long as he does have a chance, would essentially be what would happen. It also basically f#cks other people over, like making things go wrong for them.
The problem is with Magnamon's own Fate Manip, which lets him overcome any predicament plaved before him. Both of their Fate Hax clashing would be the most difficult and convoluted thing to explain. It's essentially the same power, even acts the same to a certain extent, but it's just under a different name. It's basically Chaos vs Miracle here.
TL;DR Their Fate Hax are pretty good counters for each other.
I might go Inconclusive unless Maverick provides an argument for the Sword of Acorns. Sonic would use Conceptual Manip, but then Magnamon's own Fate Hax could prevent it. Somehow.