Not sure where this topic belongs to.. I currently have two copies of D2R on a desktop and a laptop. Mostly uses it to rush myself. Thinking about getting a 3rd copy for that increased drop.
Thinking it might be easier if I was able to multi-box on the same computer. Anyone have experience with that? What program do you use? Can a Rtx3070 possibly run 3 copies?

3070 runs 3 clients fine. You'll be RAM (4-6GB/client) and CPU limited before graphics card.
I use ISBoxer personally, though there's free options.

I have a ryzen 5 5600x and 32 gig of ram so i should be good there. I searched around and the one popular and free option involves deleting some kind of checking process in order to run multiple battle.net login program. I'm not entirely comfortable with that. Are there other solutions that doesn't involve deleting processes?