To be honest, these are probably some of the things that need to happen to do make this a thing:

BST needs to get the following JT:
Accuracy Bonus III: 30, 50, 75
Max HP Boost IV: 35, 55, 75, 95
Shield Defense Bonus: 85

The Job Trait: Beast Healer needs to change to include: Copies 1 status enhancing effect per rank in merits to Pet When Using Reward

Job Ability that needs to be Add:

Empathy's Bond: Decreases DMG Taken By Master and Increases Accuracy for Pet and Master the closer they are together
Level: 90
Recast: 3m
Effect Time: 45s~1m

And 2 or more Shields designed for BST EXCLUSIVELY need to be added. They also need to change BST Shield ranks from E to C.

>_> JA was just a last minute thought, and still a WIP, but the Gear and JTs are pretty solid... I think