First off, I would look into a quality buoyancy class that focuses on Buoyancy, trim, propulsion techniques, air shares, etc., so that you can work on better air consumption. Secondly, I am a fan of the Long Hose/Short Hose config. In an O/A or low O/A situation your best option isn't always straight up. Air permitting if there is an anchor line near by, it may give you more control to ascend on that then mid water so regardless if you need to swim first or just ascend, the Long Hose/Short Hose config. makes it a lot more comfortable and less stressful because it gives you more room/space to work. Some divers view this config as a hassle but the air shares are more intuitive and easier, in fact my own daughter (10 yr old) just go certified and has no issues deploying or stowing with this config. We have a pool at our shop so when divers test out regs before they buy, we show them this config and about 85% switch over to it. Due to the fact that it is so intuitive and easy, I find that divers in this config are actually practicing air shares more frequently.