I'm running for an alchemist, and he's definitely an extremely effective party member. Just keep two things in mind:
(1) Fast bombs is always worth it.
(2) The one that lets you avoid splashing your friends would be greatly appreciated by all.
Other than that, since you're going to be high-INT, if you don't have a bard be sure you pick up on all the key skills (Knowledge: History, Religion, and Dungeoneering), as well as Azlanti (if your GM allows it).