Enter the dungeon with an ultimately imbued Arcanium Sword and Armor. For the sword, do not balance your minion sacrifices in order to get a bit of everything. Focus on increasing the damage (brown minions) and a small amount of the green minions to do plenty of damage with the power blow. For the armor, do not balance out your minion sacrifices to get a little bit of everything. Focus on increasing the defense (brown minions) and a small amount of the green minions to regenerate life slowly. Do not take any minions with you. When you go into the dungeon, approach each group of enemies slowly to face only a small amount at a time. When your health gets low, run away and regenerate.