To unlock the Knight Time Strike AR challenge, I have to "perform 2 Perfect shots in a row in a drone tank battle". To unlock the Untouchable AR challenge, I have to "perform 3 Critical shots in one drone tank battle".
I'm told perfect/critical shots are actually the same thing. If so, what is a perfect/critical shot, how do I make one, and how do I make two in a row? If they are different, what makes them different?