Can't figure out how boss was resisting all my stuff

[Morikal]

Scenario: I am level 10 at the bottom of The Maze.
The boss spawns as a level 17 (!!). Luckily I'm a super tanky/healy shield warden. (I had 3 strong heal talents at the time and a damage shield, and some mobility and cc stuff.)

I examine him: 30% armor hardiness, 3 armor, 6% resist all, 34% lightning resist.
Ok, great.

I attack him. I get messages indicating his armor absorbs my 9 arcane damage, my stone vine's 12 damage & 8 arcane damage, and my various other damage.
The fight took FOREVER. Like 200+ turns, I wasn't really counting, but used dwarven resilience at least 5 times.
I could do maybe 4 damage to him here or there.
My elemental halves did a bit more than that, but not much. His armor absorbed almost all the damage.

What gives? I didn't see anything that would let him absorb arcane on his armor, or so much physical damage. (His only talents were striking stance or whatever that brawler thingie is, and a couple attack skills.)

My character is here: http://te4.org/characters/159830/tome/8 ... fd2428a9d7
I don't know if there is a way to get more of my log? (If so, can someone let me know how?)

[Candesce]

I didn't see anything that would let him absorb arcane on his armor, or so much physical damage. (His only talents were striking stance or whatever that brawler thingie is, and a couple attack skills.)

Striking Stance gives flat damage reduction. It's something to watch out for with Brawler rares.

[Velorien]

There's a log file in the game's main folder.