An Alchemist, a Ninja, a Wizard and an Investigator? Hmm.

I definitely agree that Hierophant seems to be the ideal spirit for that group, particularly if Infusions are your primary source of healing and status removal - they're difficult to use by characters that are already afflicted or dying. Is the Alchemist going for ranged bomb-chucker, or a Jekyll/Hyde melee setup? And what about the Investigator?