Rifle Scopes What's the best power rating I need for 1000 yd distance accuracy?

Since I've never heard of that condition, I can't answer for you, but I can tell you this, the natural position for shooting a rifle entails looking through the top edge of a pair of glasses.
Some of this can be mitigated with an adjustable cheek piece so your eye is aligned differently, but I think positional shooting would still be an isse.
Might be better off learning to shoot your rifle left handed.

Take a look at SSP Optics. They make all kinds of combinations and you can get glasses with the bifocal lens on top. 2guys I shoot with have the lens on top in the right eye and in the bottom on the left.