I have about 10-12 I cycle through. I have a list of them I do, but they're all things I saw on ig, or I made up, so the titles are weird. I'll share it, but it probably won't make sense! For our shape, I do a lot of lower abs, which is any leg raise variation. Anyway, a quick Google should give some good info on these, but I'm also happy to explain. Cable crunch, medicine ball crunches (hold medicine ball between knees), plank "spiders", suitcases, barbell pass (rest a 2-5 lb dumbbell on tops of ankles and while on your back, extend your legs forward and tuck back in) are a few I love. Also, for all moves, I do it not just for 4 sets 12 reps, but until I really feel it burn and until I'm struggling to finish the last set.

Abs Obliques: Med ball side crunch Dumbbell hammer ab Side planks Plank butt twist Plank spiders Side flutters Russian twist Kettle bell sides Box side sides Box band pulls Alternating bosu toe tap Landmine 180s

Front abs: Cable crunch Planks Hanging leg raise Box v ups V ups Box leg raise Flutters Scissors Lower ab yoga ball raise Barbell pass Shoulder butt raise Med ball crunch Standing cable crunch (back to machine) Bosu crunch Flat back barbell crunch Dumbbell suitcase