Why didn't they just grab a bunch of Druids/Enchanter(s?)/and sorcerers and just constantly stun/sleep/slow/kite this asshole?
He gets stronger the more people there are. Also MP isn't infinite.
Right, but using straight up video game logic you'd think that 5 casters and 1 dps is all you need to take down this guy.
It's a raid boss that requires at least 24 players. To add to his inherent bullshit, he's utilizing the power of the mobile suit which grants him superior defensive skills and the ability to flee whenever he feels like it. The only reason they were able to trap him in the final chapter was because they turned off the Magic Circle that was powering the suit.
Also that team comp won't work.
Oh fuck is that Soujirou?
So that kid getting impaled isn't Soujirou?
Oh, her. No. She's one of Soujirou's girls.