Just beat him as one so I'll throw my two credits in (Juyo form, Watchman tree).
I had Kira jump in first, jumped in a second after once she had his aggro. Started laying down all my burn skills. Watched CLOSELY for any time an ability bar started to charge and used Kick or Stasis when they were up.
He switched attention back to me halfway down, so I threw up Rebuke, Ward, and Call to the Force once Ward was down. I didn't even have time to build up 30 Centering before he was down.
TL;DR: Interrupts have gone from never used to crucial in this one fight. USE THEM.