The sharks, no problem but the Blue Hole at about 100’? A decompression dive on top of a cave dive? So how long do you decompress after exploring the cave?
It's been over twenty-five years, so there's no way I could possibly remember the dive plan, but we did plan the dive, and we did dive the plan. Based on the depth and the time spent at that depth, we made about four stops for varying lengths of time during the ascent.
It’s not a simple answer. See http://scubadiverinfo.com/2_divetables.html Short version: This is not a game for amateurs.