If you haven’t done any stage diving, I would spend a decent amount of time practicing with your SM AL80s and one additional AL80 as a stage. Getting comfortable switching between the stage and SM tanks, dropping and picking up the stage, etc…is something you’ll be relying on all the time. It took me a lot of practice to get fluent at re-attaching the AL80 stage to my drop D (I have a razor). Once you’re pretty good with the clumsiness and off-balance of having 2 AL80s on your left and one on your right, managing the smaller deco bottle should be a lot easier.