armored Corruptors is fairly accurate.
armored Blaster, well, that's was not ever going to happen.
having Blaster anywhere near a Sentinel description is the mistake.
Here, I've fixed it:
The Sentinel is a powerful ranged combatant with moderate protective powers and protection against control powers. Sturdier than a Blaster Corruptor, it also has the ability to distract enemies to avoid being overwhelmed.