Batch processing a stack of print takes no time. If you have nailed properly all the exposure/dodge/burn/etc parameters, you could simply make the duplicates by exposing them all first, then developing by shuffling a stack of sheets at a time in trays. No need to wait later.

Occasionally I do this for contacts when I have a large batch of the same film to proof. But it's tricky because shuffling prints in the developer is like constant agitation, thus augments the print contrast.

What I prefer to do is to develop one print at a time, but stack them up in the stop bath (that's what it's for!). Once I have a dozen or so print, I shuffle them in the fixer. I don't know if it saves me processing time, but it cuts down on the number of manipulations and backaches.