Ha ha, oh god.
Anyway, I beat Dark Fact on Nightmare after many a retry and continued on. Ys II on Nightmare is... interesting. You're forced to rely on Fireball spam a lot more than on a normal playthrough when dealing with regular enemies. I'm now at the Ys core and ready to take on the final boss, but in an act of sheer stupidity I choose to save my game after going through the final door (because I didn't want to click through the extended cinema scene with the Priest's descendents every time on reload) which unfortunately is the-point-of-no-return. And I come to find that even at Level 50 (8 points away from a level-up!) and the best equipment in the game I'm simply not doing enough damage before I'm completely annihilated.
I was really rushing this playthrough, so I'm not surprised I might be underleveled but I can't leave the core anymore to grind. Am I going to have to scrap this run? Dang. What's a reasonable level to challenge Darm? Or rather, how high a level can one grind to before it stops being worth the time i.e. enemies no longer give enough experience to make it worthwhile?
The thought of meticulously attempting to dodge every projectile while attempting to get close enough to strike x 100... I don't think my heart and mind can take it. At the rate each strike deals only a sliver of damage to its lifebar... yeah, it's going to be a miserable battle.