Shashtar Vidia Is a failed aspect in my life.
But I know an ustad who I have spent some time with.
he mentioned something along the lines of.
1. Doing and co-ordinating naam abhyaas with vaars
2. Doing Shashtar naam mala - chandi dee vaar - etc bir rasiaa banian co-ordinated with vaars.
He said, it's the right way to measure timing of vaars and increase stamina, and get guroo sahibs strenghts in vaars.
not sure how many people teach THAT today!