[O.B.Left]

If you're working through the basic motion curriculum then per 12-5-0 6. "The Strong Single Action Grip (10-2-B) is mandatory throughout". Obviously you have options, so whatever suits you I guess. Ideally you want the pressure through the pressure points behind the shaft.

Yes, agreed and you do have options, several trillion of em.

Yoda often employs a 10-2-D grip when hitting. Its about the only way you can tell he's hitting unless you're standing right beside him and can hear the knock out punch he is giving it with his actively extending right arm.

When he's hitting he's more Ali than Frazer. Floats like a butterfly, stings like a bee. Still lots of drag and lag. Thats the way he does it anyways.

But start in Chapter 12. It is the only place to start your journey.