Picked up on big fishing earlier this year, been enjoying the process, filling out the logs, learning all the tricks, etc. But there's one thing I've never been quite sure of with using Surface Slap when you're aiming for something rare or hard to catch:

Is it better to Slap the (seemingly) most "common" fish, in the hopes that it means an even higher chance of catching what you're after? (does the "percent chance to catch 'common fish'" get equally-ish distributed to everything else available?)

OR

Is it better to Slap whatever has the longest bite time, to reduce the long waits between hooking something you don't even want? (more casts, even if most are trash bites, means more chances that you'll get what you want?)

Up until now, I've been going with the latter. Don't wanna wait 20-30 seconds just to find out I didn't get what I'm after. In doing so, I just sorta assume, as long as something is slapped away, the chances for everything else go up all the same
But. If it's possible that slapping away the (hypothetical) 50% chance fish means a higher increase on the rare fish, compared to slapping away the (hypothetical) 20% fish, maybe I need to reconsider my approach.