Yeah I kind of doubt paladin will ever do anything like become a world hopper. He really doesn't have that same personality that seems to make people like Hoid and Khriss wo well suited to it. The only way I could see him lasting longer than his normal lifespan would be by becoming a herald or something like that, where he's essentially sacrificing himself to protect other but in a way that still leaves him alive.
I don't really want that to happen though because I think it would just be really sad and not really complete his character arc.