Oxy is dangerous to use on anyone but yourself because of the tendency to remove ALL pain penalties for just long enough to try and 1v1 a crusher.
Hypo with inaprov is real nice to have for minimizing time spent working on dead patients. Also you can pop it in the guy who just got flung into a gas cloud so you don't have to strip his gear off.
Good guide, keep it up, way too much ammo don't even bring a gun.