Link to my final battle recording.
I'm not sure if Flexible Combat procs with Warden's Call but if it does that would be the next best offense choice if you don't have EoR. Vital Shot or Windblade could be alright, or a defensive prodigy. If Spelldrinker doesn't drop, then the next best would probably be Shantiz, then a good on-hit effect (gloom, amnesia, or cripple), then a good defensive one. Unerring Scalpel is good early but late you will probably want a Perfect Strike pick. I didn't do anything after the final bosses so I haven't tested Atamathon.
And with any talent where a warden does melee.