Talking about tactics... I very much designed Galahad's combat style off of the classic Final Fantasy Red Mage or a sort of spellsword build. In a combat role, he's fairly flexible, either as a light frontline fighter with sword and spell, or a backline DPS with his bigger, heavier hitting spells. He'd either be at Stina's side (or a bit behind) jumping in when an opening appears with his gunblade and telekinetic spells during a skirmish, or in the back with the other mages raining hell in larger scale combat. I guess in a way he'd also work well as a sort of bodyguard for the other backline characters.

From a tactics perspective, its a bit weirder. Especially when it comes to small unit tactics in a non-homogenized military group (commanding the warband is a lot different than commanding a US Army rifle squad). In a Rifle Squad, since everyone is expected to have similar if not identical capabilities- most squads in the US Army consist of 2-4 fire teams, which are then broken up into individual, but similar roles- so its easier to divide a 12 man squad into a base of fire element and a flanking element. But the Phoenix warband is not 12 riflemen, we're some 8 diverse specialists. With that in mind, tactics for the warband would depend a lot more on individual skill than a traditional guns heavy military unit.