ShopTalk: How to pick torque?

[mlicht3]

When choosing shafts for a customer is their a rule of thumb to look at for shaft torque? There are many shafts that have similar swing speed ratings but very different torque. Rather than simply trial and error there must be something to work from. It seems easy to say that a low torque shaft is better but there must be something that falls under the "no free lunch" rule or a time when a higher torque shaft is the correct choice. Thanks, Mike Licht