What stat(s) to track on the bench?

A reader's question, answered

Hi Jack,

I've been a newsletter subscriber for a while. Love your content. 

I was my college team's video coach for the past five years, but now I'm on the bench during games as a regular assistant coach, and feel like I'm struggling to stay engaged and useful. If you could track one thing as an AC on the bench, what would it be?

Thanks,

James

In the AHL & P…