With some changes you can easily run T13 and G65+.
Familiar -> Magic Weapon - Deflection
Storm Armor -> Diamond Skin - Enduring Skin
Astral Presence -> Unstable Anomaly or Elemental Exposure
Warechian Armguards (Cubed) -> String of Ears
Boon of Horder -> Bane of Powerful
Wreath of Lightning -> Bane of Stricken or Esoteric
I also prefer to use Nilfurs Boast for the 350% meteor boost on elites.
Currently running this build at an average of 5 mins / run on T13 and G65.
Depending on gear you can swap out skills/passives for more dmg as long as you can survive, try to balance it out.