There should be no pressure on anyone to complete that dive or any other dive. My boat and most boats usually choose the sites, most times the far southern sites, Maricaibo or Punta Sur are talked about a day in advance so that everyone can choose the gas they want.
This is a dive profile from Devils Throat - solo dive - just strictly to take pictures entering and exiting the caves. This is just an example showing how long your PO2 is over 1.4 - it's less than two minutes, and it tops out at 1.6 - this dive at 32% nitrox is done all the time and I wouldn't do it any other way.
Whoever you dive with, they will have some profile or dive plan that should last 45 minutes, we do 60 minutes no problems there as long as the client has good air consumption - it's all in the planning.
This is a dive profile from Devils Throat - solo dive - just strictly to take pictures entering and exiting the caves. This is just an example showing how long your PO2 is over 1.4 - it's less than two minutes, and it tops out at 1.6 - this dive at 32% nitrox is done all the time and I wouldn't do it any other way.
Whoever you dive with, they will have some profile or dive plan that should last 45 minutes, we do 60 minutes no problems there as long as the client has good air consumption - it's all in the planning.