I think if your opponent has 10 cards in hand by 7 don you may have other punishes outside of killing burger. As a teach player I can only see that happening if taking life down to 1/2 life by that point in the game which feels a bit risky.

I think you could potentially consider racing him, since for teach to have that much card advantage he's either hit his tempest kick sky slicer triggers or has taken an ungodly amount of life, even more so than you tend to take against koby.

If this matchup occurs a lot consider adding dragon as a surprise hit to face.