Once Mark was done with them, he then moved over to the other free points that he had. He also had a thousand skill points to use any way he wanted, and Mark immediately decided to improve the True Sight skill first. That skill was very useful. In fact, it was more useful than almost any other skill that Mark had because it allowed him to judge his opponent's strength and decide the best course of action to take in fighting against his opponent.
If you know your opponent's rank and skills, then there is nothing to fear since you can just think of a way to counter them! As Sun Zu said in the Art of War, know your enemy like yourself and you will win a thousand battles - or something like that.