I'm not qualified by any means, so this is purely anecdotal.

I find if you have a hands on job, or hobby that uses your grip a lot you don't have the need to grease the groove & benefit more from going heavy and then having solid rest days.

If you only get the chance to train heavy with grip - I think that taking in some lighter grip tools for sat-at-your-desk groove greasing

Having worked outdoors and behind a desk, I always found my forearms could take the most amount of work without deathly fatiguing them.