Athos is kinda the floater here, I'm not sure if he'll be trying to nuke from the back rows - Can he fly? Thats not typically something people in Fire Emblem can do, so I'm honestly not sure.
Athos doesn't fly in FE, but he gets all of Cielo's and Agahnim's magic. It's been argued that Cielo's magic would include his demon transformation, in which case Athos gets the whole "jet speed flight" deal.
He's also extra dangerous in this setup because he gets Agahnim's shadow clone magic. Not only does this mean 3x magic spam from Athos, but your team won't necessarily know which one is the "real" Athos -- only the real one takes damage.
On the plus side, Agahnim is a bunch of lol and Gene is a bunny. Cielo and Athos x3 are the real threats here.
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You put your RESOLVE HAT back on, which conveniently is the same hat as your NORMAL HAT.
{Drakeryn}