Diver one of sixteen to die using high-tech gear

[DRE]

Divermole,

thanks for the gas management scenario. Personally I dive twin 18L, with AL40cf deco bottles. It seems to me your group has figured out ways to deal with gas loss scenarios and still being able to complete the deco safely.
How do you calculate your gas consumption? Personally I always plan for the worse that can go wrong and give myself a saftey margin in terms of gas I carry with me. So do you guys calculate your worst case scenario based upon complete OC bailout or not? For the entire team or not?
Question: do you do any extended overhead environment diving and if so, do you change any of your gas management practices?