hmm I do weighted decline situps and hanging leg raises, some times I do weighted side bends and I have done the ab wheel before. The ab wheel is the only none rotational static one I do and I admit I have done it twice and may start using it a bit more in the future but after a session of weighted situps and weighted side bends before I started using thr wheel my core was always sore as fuck and I can tense my abs and they show through at 18% bf, and without any bloat or anything like that on an empty stomach the outline of them showed through the fat when relaxed. They wouldnt do that at this bodyfat percentage if they hadnt grown or thickened since I started training so I can say the ab work I do, coupled with never wearing a belt for squats, deads, rows or presses had worked well to thicken up my abs and pretty much every exercise on your list of favourites in your log I have never done before...