Did anyone notice that the skip is either -20iso from the bonus or -5 from your stockpile. So technically if you want to maximize your iso accumulation and want to fight reasonable opponents, the best way to do this is to keep skipping until you find 2-3 suitable target instead of 1.
In the past I would keep skipping until I finally found a good opponent and then fight right away. But with the skip tax at -5iso. It’s better to keep skipping until you find 2-3 good opponents. Because likely you will have to skip on your next fight which would cost you 20 iso bonus for each skip up to the third.