Acnologia is one of the strongest dragons in all of fiction. His skills are absolutely immense and I don’t see Makarov being able to do much against him. The old guy is really strong and the leader of Fairy Tail for good reason but he’s well past his prime and even in his prime he wouldn’t be able to do much here. Acnologia can pretty much wipe this guy off the map with one full charged energy blast. There’s just not much that can be done about that. Acnologia wins.