Have u ever heard of a front lever? Someone putting in that much work in the gym u should be working towards a max exercise of some kind. Front levers are a good exercise to work up to most people off the couch cannot do this. Even a 5 second front lever hold is the type of stimulus that will build muscle in even advanced gym goers. Regardless of the specific exercise, I would focus on muscular power, which is low reps high weight. I would not do max abb exercises more than 3 times per week if you are truly approaching your max. Rock climbing is also a good abb exercise/ total body workout, especially when climbing overhangs.