While I am certainly no Sentinel expert, I put something together that has more damage, defense, and resists than your first draft.
Suggested Incarnates: Cardiac Core for more endurance, resistance, and range; Reactive Radial for extra damage and -resist to stack with Opportunity; Pyronic Core and color it dark; Ageless Radial for recharge, endurance, and debuff resistance; and Assault Radial for more damage.
And with this chain you can do 245 DPS - Abyssal Gaze --> Antumbral Beam --> Soul Storm --> Abyssal Gaze --> Antumbral Beam