Nice battle, close and fun to read ^^.
But seeing as I am a cross tier trainer myself, I have to ask what kind of set you're using on Feraligatr. I used him alot and even have one in game and I have feeling you're using the dragon dance set, which you should not be using in OU, as it is severely outclassed by Gyarados. The swords dance set is much stronger and separates him from Gyarados, giving him a niche. The set goes 252 atk, 252 speed jolly, aqua jet, waterfall, return and swords dance. Its walled by Jellicent and Empoleon, so change return if you need some other coverage or don't want to be walled by these two.
I'm only trying to give some constructive feedback, please disregard this if your Feraligatr serves a special purpose with those moves ;).