Instructions
Purchase the "A Worthy Eye" quest from any Pub. This quest becomes available once you complete the "Pale Company" mission. You will be informed that this is a "dispatch" mission, which means you must send one of your party members off to complete the quest for you.
Choose one of your clan members to go on the quest. Once you accept the mission, a window will appear with a list of available clan members. As you highlight each one, his sprite will appear.
Look at each party member's reaction. They will either be jumping up and down, walking or kneeling in the "Low HP" position.
Pick any member who jumps up and down, which indicates the highest chance of success. If nobody is jumping, pick a walking clan member, which indicates that he has a 50 percent chance of successfully completing the mission.
Go out and fight in random battles if all of your party members are in the "Low HP" position, which indicates the lowest chance for success and will almost guarantee your failure in the mission. Raise everyone's level up by one or two levels, then return to the pub and accept the mission.
Exit the pub and fight in some random battles. Win as many battles as it takes to defeat a total of 15 enemies.