I managed to figure out both puzzles this time. Though I got the Eye one upside-down the first time. And the (I think) tweaking of the cryptic clue really helped.
Awesome Boss Battle too. It didn't evolve much beyond adding bullet-spawners, but just dashing and reversing around the arena to avoid the homing attacks and gradually chipping away at her health was fun in in itself. Really felt like an ass-kicking Vampire Hunter!
EDIT: I died once and lost my Upgrade, but the doors I opened were still open.
EDIT 2: Boss fight - MM21 - Valpurgis Final Boss
I just thought, through the Boss battle I was swapping gravity for fun, mostly relying on the dash to avoid projectiles. A Phase 2 where she starts alternating a hazard on different layers of the arena would be a great way to integrate the gravity swapping. Like, she changes where the spikes are, or summons an electricity cloud or something.