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.

Drogoz' ultimate will likely hit one of your illusions when placed right

You can use ying's illusions to counter drogoz ultimate by putting an illusion in his way. (he'll kill the illusion instead of a teammate)