Those are some nice ideas. For the aura suggestion, unfortunately I dont think auras are useful enough to make it worth anything. If fire aura got buffed, then okay. Maybe to fix ele's lack of dps party support in raids, we could share the conjure's stat buffs with our allies (put it on a trait for example). It would have to be a fixed duration or something, so you arent forced to sit on a fgs all day. As for the ammo system, I think it would be enough to pick up the weapon from afar like thor. Make it so pressing the utility key a second time picks up the second conjure within a certain radius.
The mirage cloak attack on axe is ranged. You can also do a shatter rotation with two phantasms and a crystal sands at range. You can also delay going to the green to minimize loss of damage.