You can jump through a small gap in the wall if you're a HU or FI with a partisan or twin daggers respectively. Here's a friend and I figuring out a method for partisan. I'm not the original founder for this! Sorry for the quality, forever poverty net.
No risk reductions, no success rate increases, grinders only, Shop area.
-450k -ish and about 150 grinders or something, probably not much to some people. Got as high as +8 and got hit with a -3 and ended at +3 before quitting.
Music: Etrian Odyssey series.
Also AGDQ 2013, Werster, and Pokemon Gold.
Too lazy to upgrade sword; didn't want to use password until I got Noble Sword either, which I didn't. Had Heart Ring L-2 Equipped as well. I'd say Twinrova part one is a bit luck based without a sword upgrade. Part 2 was a bit annoying at first, but not too bad. Ganon himself is fairly easy once I learned his patterns. For those who don't know, the blue background change makes your directional controls reversed.
Screwing myself over with Double Point and making silly mistakes. A pretty fun boss though! First attempt victory~ Time to grind for 100%! On a seperate note, shortly after winning and beginning the grind, I learned about Slashman auto aiming of his kunais.