Flopped in arena? Lol.
She topped the meta report for like 4 months. Only since the EP Vader rework has she fallen, and she's still second or third with Rex.
And she absolutely is not a requirement for non HSTR. The second and third place finishers in my guild don't have her, but what they do have is five strong other teams.
Did you know that in T4, a Deathmark team can put up as much in P3? I did 7m with each today. Did you know a NS team can put up 5x the damage a JTR team can in P4? Mine did today.
Do you play the raid?