Fully calculate all gases. Right now it doesn't intelligently fallback like you would. So theres no way to use all of a 50% (or whatever lower threshold you set) and the air deco the rest.
So if for example 50% is used up, continue deco on Air if available, and so on and so on.
Intelligently use multiple gases for deco, don’t just throw up hands if the best gas runs out and go negative, try to be smart about using available gases. But also show a warning that you’re using multiple cylinders for deco
