I understand - if you use an AR to abuse, then you will ALWAYS have to use an AR for abuse if you're doing it via calibration. Different AR codes affect the game differently, so load up the same code every time. It doesn't matter if you fish or not - as long as you enter in the right information to seeds to time, it will always work since you're looking for your delay - the thing that changes once you enter the game is the frames from your movement and actions and the NPC actions.
Though to be honest, heres my advice: The average delay for Platinum is about 600. Just use the calibrations you have so far to determine whether or not your game has odd or even delays :)
Download ZOMGTimer from ToastplusOne and use that for your abuses. It's definitely an integral part of future abuses where you go for high delays :)
Also, as a note: IF you're doing egg abuses, it's much easier on HG/SS :)