Your weapon attacks are very precise and deal a surprisingly large amount of damage. Barring if he's being healed, if you focus your attacks on Drogoz, you should be able to take him down within a single clip.
Your illusions is a counter to Drogoz ulti; if Drogoz crashes into your illusions, he kills the illusion, not you. Hiding behind your illusion is a good idea, or move towards Drogoz and place ur illusion to soak the ulti for your grateful teammates.