Hi
Looking at your planned profile you would screw yourself up with He in the deco gas. The stops after that switch are too short. Helium demands a better (ie longer) ascent profile than that IMHO.
Helium in the deco gas is usually only recommended with longer bottom times for a two deco gas dive.
Sorry, to make that clearer, with only two deco gasses you don't need helium, but with more than two then you would, unless your bottom time was longer than an hour say.
Andy
PS Oh, and I'd do what Bob did
