The height of your rings is all about how the gun fits you, assuming there are no basic clearance issues as with the Genesis and its cam.

It's a pain to buy and try different ring heights, but if you have a few guns you'll generally know what height you need if you compare the stock designs.

Stocks with more drop can use lower rings. Your typical lever action gun has drop in the buttstock, to put the eyes of your average shooter on the iron sights. A straight buttstock can require higher rings, as the shooter's eyes are higher in relation to the top of the receiver.

You want a good cheek-weld to the buttstock for proper fit. Get that gun pulled in properly with your cheek on the stock. Then without moving your neck or face look into the scope. If you are not lined up, adjust ring heights. I had an 870 with a scope, that required an add-on pad for the buttstock. Even with the lowest mounts I could get, my cheek was floating above the stock. Bear Creek was the MFR I think. Good gun but it's down the road now.