I'm in the middle of a similar project but using a mirrorless camera with a macro lens and a repro stand.

I second most of this, but would like to offer a different opinion about triage. In my experience, doing the triage often takes as much time as digitizing the slides. "Mindless" mass digitization where I just optimize for throughput has been a good strategy for the collections I've worked on.

Instead I'm more careful of what I choose to post process after I digitization. I haven't been throwing much away yet, I usually just don't process the stuff I don't find interesting. Storage is cheap these days.