Here are the two mindstars I was wielding during the final battle:

And here's how that battle went:
http://youtu.be/GAMYzqAdeH4
And just for shits and giggles, here's one screenshot from my climb up High Peak. What happens when someone who deals millions of points of damage meets a rare with Displace Damage?

(It was the Orc Pyromancer with Displace Damage. So he took about 1.75 million damage, and I took about 1.75 million damage. Yeaaaah....)