Yeah, grinds do help alot, i would say have a MEGA deep grind because, well use some common sense, it cant be too good for the rim. An average grind is just right really, although if you cant be bothered to do a grind on your rim; just use some tar, its really good in the summer. The only bad parts about tar is the amount of times you have to put it on and that it runs in rain, making your brakes slippy.
Sorry about the slight wall of text