(Then again, most of the jobs will need to be made nigh-unrecognizable from the class to second job. GLA and CNJ are great examples in that they can do nothing remotely resembling anything but what they currently do. I would not be surprised if SE simply canned second jobs entirely for the original 7 classes.)
I'd only agree with Gladiator. Conjurer has 5 offensive skills to work with. Not a great kit but enough to form the foundation of a DPS build (and the thematics behind the class' questchain just screams geomancer). You'd just need to backload offensive utility into jobskills (probably with a 'kitchen sink' stance at 30). Clumsy until it gets its entire kit, maybe, but not significantly moreso than a low level scholar.