The idea behind Sia's cohort was simple but efficient. That was what Achilles had drawn to a conclusion when seeing their line-up.
According to his knowledge, Mina had an ability that allowed her to summon crystal-like creatures which could help them deal with the problem of lacking a tank.
With the fox girl's defense, Sia could easily cut down anything swiftly and easily without hinder.
The same went for the backline where Ryan had proficiency in using a shield and hammer and could use them to protect Luna and create chances for her to attack.
As for Achilles, he only had the mission of scouting together with Ryan and keeping the healer safe.
Well, he still had to help the group that required help. But he was quite certain that this kind of terrifying team combination would crush anything that got in their way. There was no need for him to get involved.
***