Well, I don't use pre wrap, and don't know of anyone who does when they're on bars. I sometimes use prewrap under my athletic tape when I rip.
It's totally normal to get rips when wearing
grips. I'll show people my rips and they'll say "don't you wear gloves so that doesn't happen?!". Well, yeah but it still happens! You want to get your hands tough so you won't rip as much, so I probably wouldn't use the prewrap.