Hey thanks for exploring that Arcanor concept. As mentioned before, perhaps its talents are best utilised for an elemental tactician or something like that.
The only reason why I’d want it with Arcanist is for the sheer visual bedazzlery of Devastation + Arcane Devastation. Nothing to do with actual effectiveness. 
That said, you have enough spare points to max Devastation on your Mage Hunter if you wanted to. I know you hate weapon switching though. 
