Make sure you really understand the objective of ANY exercise or routine you do.
Boast and Drive has to be one of the most, if not the most, performed practices in squash. The problem is that I rarely see it performed properly.
I am not going to detail that routine here because a video is a much better medium for that, but in general the boaster is trying to hit a low, fading boast that takes its second bounce in the nick and the driver is trying to wait until the moment the ball is very close to the sidewall and then hitting a parallel drive along the wall with the second bounce hitting the backwall a racket’s head height.
That’s not even talking about the players’ movement.
Now, the key is to know these kinds of things before you do the routine, because if you don’t, at best you might be wasting your and your partner’s time and at worst creating really bad habits.
If you don’t know what you should be doing, ask and ask people you trust, ideally your coach or mentor. If not those, ask me.
I’ll be coming back to routines in pairs soon.