Heidrun Thaig solo with 2h champion with nightmare difficulty and all trials on.
It was bit painful though.
Because that stupid emissary kept shooting fire ball when I was fighting two Genlock alphas.
The key point was magic defense.
Make a Refined Battlemaster Coat with Vanguard Coat Arms and Battlemaster Coat Legs.
Then you can easily make more than 40% magic defense.
And also you can use rock armor tonics and pitch grenades.
About accessory, use Amulet of Death Shyphon.
With this amulet and Livid + To The Death combination, you will be invincible.
Most champion’s fights are about gaining guard guard guard.
Axe of The Dragon Hunter (For critical chance)
Masterwork Orante Two-Handed Haft
Dragon Tooth Masterwork ( 40% Chance for Critical Crafting)
Refined Battlemaster Coat (For magic defense)
Fade-Touched Plush Fustian Velvet Masterwork (10% Chance to Use Hidden Blades on a Hit with 5 Added Hits)
Amulet of Death Shyphon (Every time enemy nearby dies this amulet heals you)
Superior Grenades Belt (You can bring more pitch grenades)
2xRing of Slicing (10% critical chance)
To The Death - En Garde (You can keep generating guard by attacking a target)
Walking Fortress - Siege Breaker (You become invincible)
Charging Bull - Gore and Trample (Good starting skill with generating guard)
Livid - Still Standing (You get guard from each near by enemy)
Mighty Blow - Easy Target (Knocking down enemies and massive damage)
Pommel Strike - Staggering Strike (You can stun literally almost everything)
Combat Roll - Coming Through (Must have! Dodging and massive damage, also fast cool down)
Flow of Battle (Must have! Every critical hit you make reduce your skill cooldown time, which means you can use your skill more often)
Shield Breaker (Good skill for dragons or enemies generate guard)
(Passive skills for unlock To The Death and Walking Fortress)