A starting possibility:
Thrown Weapon Alchemist with Shield in the other hand. Presumably with a solid focus on bombs and poisons.
Allows you to be juggling multiple alchemicals and poisoned weapons whilst keeping your hand free for Quick Alchemy.
Focused Juggler helps fix some of the action economy in a class that is always drawing things, (prepared Alchemy and poisoned blades from a Bandolier.)
