Why do you need that much ab work?
You're doing 14 sets of rectus abdominis + 3 more of obliques.
pay attention to how much volume you can tolerate. My workouts for the last couple months have been around 8-12 sets, including ab work. I can do more sets than that but prior to lowering the volume I felt burned out and was dragging ass in the gym and not making progress.
I prefer windmills but saxon side bends have their place. With windmills you can handle more weight and it's a greater range of motion.
The best my obliques have ever looked was when I trained them 3 days a week 2-3 sets x 3-8 reps. The higher frequency paid off, but I eventually burned out. Keep that in mind and switch up your ab exercises every couple weeks.
As for rectus abdominis I like the idea of using a conjugate approach with a rep day and a max day. Rep day could be max knee raises or sit-ups (do as many knee raises as you can rest 90 sec's repeat twice), max day could be working up to a heavy cable crunch or weighted sit-up. That's it for the week: 2 rectus ab workouts and up to 3 oblique workouts. If this felt insufficient then you could add in maybe 1-2 exercises after the max day and rep day.
You could also do rectus ab 3 days a week, but I believe the abs should be trained with trunk flexion and hip flexion so incorporate that or stick with the max day/rep day.