Sounds like I need to try out dual spec instead of grandmaster. I hit 60 on him and geared him up. His grandmaster play style is simple and he does a metric ass ton of single target damage. He also has zero AOE which limits what I can do in danger room or patrols. No bueno.
The spec is probably the issue. Someone on Reddit linked a test center post saying they were going to buff his AOE, but it's no longer available. I have no idea what they're planning. AOE is literally my only concern with him, so if that gets some love I'll be ecstatic. I don't worry much about durability since I can slap the shield legendary on him and take a few defensive omegas.
For the time being, I'm playing Rangepool after Queen's suggestion. Pure awesomeness. Solid damage, solid durability, great animations, and the all important teleport. He'll be my omega farmer for now. The melee off spec is also great and is a fun change of pace. Gotta watch his movie soon.