The Predators metal weapons are lighter and tougher than Titanium as explained in Predator 2 so Jason will be cut and have limbs severed if hit in the right way. The Predator should have the Staff, wrist blades, and Disc weapons as they are melee weapons that can be thrown just as easily as Jason can throw his sword/machete/knife.
Also if it's allowed AVP 2 had a wrist gauntlet that can punch through feet of concrete while making it explode in a single hit.