You can’t beat a set of doubles. I have two configurations that I can put together, the ones I use the most are a set of LP77 2440+ therefore ~160cf. In the ocean I need only to add 4lb or switch to a steel back plate in place of the aluminum one and I am all set. Plenty of air and then some. Had them down this past weekend to repair a boat, one of our underwater attractions, and even filling the lift bags off my air still had more than enough when the others were returning because of low air. BTW Water tem was 45f.
Best Fishes!!!