To put this simply, in an RPG you don’t need rules. Not really. What you need to be is trustworthy, and that goes for players as well as for guides. What you really need is to be honest and to ensure that your players can trust you, and that your guide can trust you. All rules can do is give guide and player the illusion that things are under control, and that no one is getting an unfair advantage.
Thing is, there will be times when somebody is going to have an advantage, and it may not be the guy you think it is. And the thing is, there will be times when his advantage is going to be dammed unfair. So think instead of bitching. He can stomp your butt like a bug? Then hide your stupid ass and find another way to get to your goal. Remember, you’re supposed to be playing a role, not rolling dice.
Being heroic can be a bitch. Be ready for it and be prepared to take advantage of any advantage you have.