i am at the post 50, and i have no idea where to start as a big fisher!!!!

my gear is bis and fully max penta melded. except the rod. i have Supra Rod. working on Lucis.

i attempted some of the big fishes but wasnt lucky for the past 2 days. there are too many and i dont know where to start really

any general advise could help. (skywatcher website is my friend. but too many pages i need to open to plan fishing 1 big fish. bait/area/weather.... its annoying. the website need some work interms of having all data in 1 page or time table.).

im basically overwhelmed

im hitting a similar wall with Cul desynth. at lvl66, cant find fish with decent level gain to desynth. either i gain nothing from low level fish while rare fish having low desynth success rate below 20%.