Playing an Arcanist right now, and I am working on a DoT-based "wither and die" character by using cross-class abilities from Conjurer and Thaumaturge (Aero and Thunder). I dunno how well this design works with the Arcanist upgrades Summoner and Scholar though. Possibly Scholar with use of Cleric Stance to swap my Mind for my Intellect plus the 10% potency boost might work though but I wonder how much people would want a DoT damage based Scholar in groups. XD

I am probably wrong but it seems like the job upgrades actually diminish some of the customization the cross-class system offers, since using them locks you into a defined role and reduces cross-class ability.

If I am off or misinterpreting please tell me. XD