I'm trying to beat Boss Battles Hard, but practically every single time I get to Pit's Body, he kills me easily. Even if I go in with full health.
I know the drill... Keep the camera on him, dodge his attacks, melee combo him, step back, and repeat. And I have beaten him once or twice here, once even while taking very little damage. But, usually, he'll catch me off-guard and land 3-4 strong hits before I can even get back on my feet. Or, he'll break out of my combo with a dodge or a counterattack, and then hit me with his own melees.
I really hate that they put this boss in here, without transferring powers, weapon mods, anything. It's the one boss I consistently have trouble with, and yet there's nothing I can do about it. The last attempt, I had 3 drinks left and only 8 more battles to go, and then I died. It's just annoying. --- What a fuddy duddy.
I think one of your problems might be stepping back. When I fight that douchebag, the only approaching I need to do is the initial; once I knock him down, I attack as soon as he gets back up.
Occasionally, yes, he does hit me with an arrow as he stands, but he doesn't get far, and I'm already in mid-swing by that point, so he inevitably is sent onto his ass again. --- An infant sea turtle is actually capable of killing an adult African bull elephant. It does, however, require a substantial amount of surprise.