I'm agree, Zador is very strong in raid and arena but as you say, he's DARTH VADOR !!!
For me he absolutly need a 5th passive skill !
something like:
"At the end of each of his turn, all debuff enemies loose turn meter equal to 5% per debuff on them and Vador gain 5% turn meter and recover 5% max health per debuff enemy."
With this, he don't win too much power but only more control and resistance. (Usually in arena, toons don't get more than 5-6 debuff in the same time so around -30% turn meter max and Vador gain maximum +25% turn meter and recover 25% health)
And If you really want something stronger (my dream !), just add to he's basic:" ...inflict Ability Block for 1 turn and Damage Over Time effect for 3 rounds. Jedi and rebel targets cannot Evade or Resist..."
