@Ironnaughty Yea, I freeze it as second hit, and then out-DPS the guardians.
Spec is used on the hit after it first gets under 100hp, and has a chance of killing it before guardians are able to spawn.
@brophy_rs Not sure, but it seemed like the best way to try improve my personal best time. DDS has a lot of potential, but something like D claws is probably better for kills/hr.