Slime is your friend. I’ve sealed up some gashes that looked like they came off of Elm Street. I’d run them until the tread is gone before worrying anymore about some small cracks. As for pull offs, the best tire I ever ran was a Maxxis something-another that came off a Kawasaki Terex. Someone here may know the exact tire, but it was the perfect mix for both rocks and mud and were built tough. I sold that bike to FurFlyin. If he’s still got it, he may can tell you the tire.