Boss Battles Thread

I need to die less. I'm too reckless under the belief that I'm invincible (but the balls aren't affected by my % HP damage reduction, the green attack is though ). The delay on my buffs is frustratingly slow for me, and Magnus keeps knocking me back (again? I thought he stopped), though sometimes that's to my advantage, like when he knocks me out of the way of a blue or purple ball.

Then again, I guess I don't really care if I die a lot so long as I kill it.