Considering it's highly likely that Musketeer will be added during the first wave of new classes/jobs (patches or expansions [hopefully patches]), I think, since the game desperately needs more healer roles, it would be a fantastic idea to bring back one of the most under appreciated jobs, the Chemist.
They would most likely be a DEX or STR based, TP using healer (as it would branch from a more physical, TP oriented class), mixed with some MP stuff, but I think it would produce a unique and dynamic healer archetype.
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