It was all i needed for plat, and i youtubed it, they were always hitting him in the eyes.
I wasnt hitting the guy for an hour and a half, that was dying and reloading. I dont think hitting him in the chest makes it easier. It probably didnt help that my checkpoint had me with little ammo, no unity, and it was a minimal run.
Hats off to you folks that can kill the end boss in 90 seconds or whatever, I wish I could be that good.
EDIT: sounds like I'm being sarcastic here, I'm not! I had a buddy over too, he'd try it, i'd try it. We just couldnt do it. Easily the worst part of my run. Felt good to finally kill him though! Seriously though, does the chest area take more damage? I'm looking on youtube, and the vast majority really do hit the eyes.