That works. There can be some ambiguity, too -- We can make Tac her cousin, and his branch of the family was not quite as criminal. Also, Tac being younger may not have been as aware of it. Elyra may never have discussed it with him in great detail, wanting to spare him, so it might surprise him to know the depth of her feelings on the subject.
Is Tac a permanent resident at Sandpoint? If not, we can leave it that Elyra heard from a mutual acquaintance he was in town, and took the first job headed that way (which, perhaps, happened to be with a PC).
As for combat, I think I've been looking at melee support. Weapon Finesse and Dodge for feats, I think, hoping to get into flanking position for sneak attacks, so no need to worry about futzing with your ranged stuff.
OK. And as Ambrus pointed out, the dragon and the priest are melee combatants as well.
Why am I worried about melee combat, anyway? We have a dragon! Admittedly, he has warm brown eyes and a fuzzy coat, but he's still a dragon!