Does anyone know if the main Lord has some form of Provoke skill? I've set Eirika and Ephraim standing next to each other to fight off a horde of enemies in two instances, and in both, the enemies all attacked Eirika, with no regard to traditional AI quirks.
And by 'traditional AI quirks', I mean 'once all the spots Eirika could be attacked from range were filled, all the Rangers equipped their swords and attacked Eirika in melee range, dying to her Rapier, when they could have shot arrows at Ephraim and avoided a counter'.
Ephraim was so good at the start of the run, but his support with Eirika probably hurt him more than it helped- he couldn't get any kills because everyone ran right past him and attacked Eirika instead.