Anyways like I said we were in 58 and 61 gear. Your set up was also far superior to ours, your gunslinger definitely made the fight easier for you, as well as your scoundrel healer.
We. Were. Not. In. 63. Gear. Far out. It's not a difficult concept.
We were also so far off enrage that mathematically 58s would not change the outcome.
I will get a commando to heal. I can also replace the gunslinger with another class, and we'll downgrade our gear just for you
Edit: I'm not on the Bastion (I'm not affiliated with the guys making these videos, to be clear).