Here is my method for defeating Arges.
Abilities used:
Overpower Attacks level 3
Venomous Attacks level 3
Hero Strike level 3
Second Wind level 3
Weapons used:
Main Weapon: lvl 51 Sword of Revolution with +16% Assassin Damage, +12% Warrior Damage, +18% Adrenaline on Hit and -1 Adrenaline cost for Overpower Abilities
Statstick: lvl 50 Typhon's Mace with +15% Assassin Damage, +15% Damage with Heavy Blunts, +20% Damage with Charged Heavy Attack and +40% Damage when attacking from behind
Bow: lvl 52 Fanged Bow with +17% Assassin Damage, +24% Poison Damage and Basic Arrows become Poison Arrows