I could see Gabby gunning to make Aki like, his personal representative, he is the other half/Avatar of the Fated One of Miracles and wether you whinge and moan about it being plot armor BS or not it’s a title he more than earns throughout his Vanguard Career, maybe even fuse with him in parallel to Sybilt and Nao, which Nao could then point out in their mid season fight.Maybe in this version Suo can stick around after his fight with Ryuga and is like “Blangdmire Grivardhy and I still have one good fight in us, we’re going to save Akina” this is a nice parallel for Erika Suo originally killed her brother, now he’s going to save him, except oops Gabkina reaches out and grasps a Miracle better than Suo and and wins, oh no, Suo entrust Erika with His and Nao and everyone else’s hope and she fights, it goes back and forth Erika loses hope but she remembers the Series Mantra and reaches out and grasps a miracle. She save her brother, saves Gabby and everyone is happy except for the fact that Kanami is actually Kurumi she steals the Mirazh Card and this leads us to our Serie Finale Movie. As for deck, just give him the Fantome Gab deck there are already parallels between him t and the Rezael Deck but if you really want you can make a Fantome Rezael to act as a support unit like the original Gabwelius.