Step 1:
Throw tank at boss.

Step 2:
Dispel diseases.

Step 3:
Dude. This phase again?

Step 4:
Avoid orbs.

Step 5:
Follow the bear around.

Step 6:

GET THE FUCK OUT!

Step 7:
Bloodlust!

Step 8:
STFU!!!

Step 9:
Avoid spirits! Die...

Step 10:
Kick in the face.

Step 11:
Ta-da!