No matter how you slice it, if the job's "niche" is turret DPS and that translates into heavy damage loss during mechanics/heavy movement, then the job will ALWAYS be inferior to bring over SMN which is a movement god right now.

The way to reconcile this, in my opinion, is to make it less punishing while moving but still punishing. Right now it is EXTREMELY punishing. Planning ahead is all well and good, but some quick aoes and selection/rng you really can't plan for perfectly. Making Fire/Blizzard instant cast during Enhanced Enochian and then Thunder Ready/Firestarter Ready from damage and Umbral Hearts respectively would probably be sufficient. (So, using all 3 Umbral Hearts on Fire IV results in a guaranteed Firestarter, and a certain amount of damage or number of GCDs within a Thunder DoT results in a free Thundercloud proc (Thunder Ready))