For Varden Task 9: I’ve detailled my strategy in another post, but here it is: get a second Varden. How?
Apothecary Helbrim (Heroic for extra oppontent health).
Team: Varden, Blink Fox, Xyrella
Take out his two bodyguards while Cycling through Blink Fox’s Mind Thief until you get Helbrim’s Potion of Illusion. Using it will give you a 1 HP copy of Varden and Xyrella. Time its use so the copies won’t get immediately attacked since Helbrim can Attack (Xyrella’s Blinding Luminance to reduce its Attack to 0) or use Potion of Madness (wait a turn). With your copies: Have the two Vardens use Ice Lance, the two Xyrellas heal the damage, and use Blink Fox’s Mana Blink: since it refreshes and speeds up your moves, it allows you to do another turn of Ice Lances while keeping Helbrim alive. Repeat the cycling of Blink Fox’s Mind Thief to find another Potion of Illusion in case your Varden copy gets taken out while waiting for Ice Lance to go off cooldown and repeat. You can Equip Varden’s Band of Frost for extra Frost damage (or get lucky and find a Treasure for extra Frost damage) to speed up slightly the process.
Also, with Blink Fox, you can also Mind Thief an opposing Varden for Ice Lance (or Jaina or Lich King for their Freezing abilities) should you get that encounter along the way, but it should be faster just heading straight for Apothecary Helbrim. Also saves you the trouble to find a Glacial Shard encounter to Mind Thief its Ice Lance or attacking with one of your Mercs and Ice Lancing him, or trips to Winterspring for the mobs that can freeze for a similar strategy. And you don’t need to have Jaina or Lich King on your team.