You swap out the fire res for Damage Boost. After that? Downgrade your shield for some more buffs.
In retrospect, I should have went Grey Owlite shield -> Barbarous Thorn Shield -> Swiftstrike Buckler, instead of going straight to the end.
Sadly, though, I failed. I ended up dying, after a series of derps. (And ouch, if Vanaduke even clipped my shield with his fireballs while charging, POOF! broken, and I'm on fire.)
At the very least, you can see what I typically do for my solo runs with the Polaris, and maybe pick up a few things.
Recorded it, for the hell of it :>
Here you go, and I hope you guys like metal.
Note: Video starts getting crap framerate at 5:44, Fraps was making it go bad. So I stopped for a second and restarded the recording.