The EV had the stock 8/33, which I was OK with, but it made starting off on a hill, especially towing the camper, a bit of a challenge.
I tried a 7/33 set, and that of course helped with the camper, and seat of the pants felt more powerful. But I ended up spending a lot of miles in fifth gear all the time, and noticed a fuel economy drop.
I noticed that MG Cycle had an 8/37 gear set. I figured it was time I learned how to shim a ring and pinion gear set. Now that I have a few hundred miles on it, I can say I really like it. It help when starting off, about like the 7/33 set. And on the highway, I use fourth OR fifth, depending on 'things'. Where with the 7/33 it was always fifth. It feels like a good compromise.