As stated I'll be playing a Pixie Archivist, which has some very strong untyped buffs that will presumably stack with whatever buffs Chimaera's character will provide.

Sionainn, which is pronounced the same as Shannon, does have some melee capabilities (weirdly enough). Due to her crazy high dexterity score and built in Weapon Finesse, I picked up the Sword of Graceful Strikes because it allows me to add her dexterity instead of her strength to the damage of her attacks with it. So her damage in melee will be pretty respectable and her AC should be quite high too. She's still primarily a caster, though, so I'll be looking into control spells, self-buffs and damage spells.