To hit and run is always the best way. He is the same speed at the normal Blade Bandits so it is not so bad. If you get other Blade Bandit is following you while you kite the boss, either drag the mob through an area which run away from the mob, and hit the boss from as far away as possible to get him away from the group. The second way to kill him is to get a party and have one of the members, probably a healer or blades man, hit the boss and run around with it. If they keep running, it should keep targeting them, providing you the chance to hit him as hard and fast as possible without having to worry about moving. The third way is hard to do, but works semi-well. If you happen to know any higher leveled people, you can ask them to thank him for you. As long as they keep hitting him, mabinogi gold players can just sit back and sniper and not worry about getting hit.