I apologize if there are some mistakes because there are some parts that cannot be understood by machine translation. You're right that both Bloodhound and Shea excel at detecting nearby enemies. Being able to grasp the position of nearby enemies during combat is useful, but this can be compensated for to some extent by individual combat skills. However, without a survey beacon, the chances of unexpected encounters with enemies increase, making skills that can instantly notify allies of enemy locations more valuable. If a survey beacon can show enemy locations to all allies and make it easier to predict their approach, I believe you will have a better chance of winning a battle if you prioritize characters with skills that give you a direct advantage in combat, rather than characters with survey skills that can be compensated for by personal technique. Currently, Sparrow or Crypto have strong ultimate skills in battle. If you want to stabilize your ranking, Valkyrie is the way to go. Pathfinder can take high ground. Mirage is an all-rounder. As for Shea, if the perfect combination could be achieved, she would be strong, but it would be very difficult. Bloodhounds lack combat skills, and their detection skill is useless in battle unless it is used in conjunction with the movements of their allies. Basically it will depend on the player's skill level, but if they have the same skill level, it is thought that Bloodhound and Shea will have a lower priority. Sia will need to improve her skills to maintain her defensive position, while Bloodhound will need to improve his combat skills.