Two people managed to fill the roles of a five-person Mercenary Group, and they were especially strong in certain key positions, like the area-damage Mage.
It's said that the best leaders are those who can handle any position and do anything. After all, you never know which position might suddenly become vacant. A leader who can excel in various roles is also likely to command their group with precision.
Thinking about it, Andrew suddenly felt like he was born to be a group leader. He could handle at least three roles—and maybe even act as bait or vanguard. That made four positions. Practically all-round! Actually, Christina could do it too, though she'd need to swap out her brain first. After all, a leader might lack many things, but one thing they absolutely can't lack is brains; otherwise, they'll lead the entire Mercenary Group straight into a pit.