[General Discussion] Overly Frustrating RPG Boss Battles - Sephiroth kicked my ass

I've never attempted Digital Devil Saga's secret boss, but I've read a comprehensive strategy on how to prepare for and beat him and Christ. That gets my vote without even experiencing it.

Same two answers I always give to this thread when it pops up.

Saga Frontier II. Knight's or Gustave's time lines, the end battles. Gustave's strat-rpg battle was downright impossible. Performing every move as perfectly as you could still relied heavily on luck. Knight's battle through the sizable last dungeon seemed insurmountable. Hardly no restoration items to speak of. Level up system left largely to random and out of your control. Of course, up to that point the game was easy enough to where it didn't matter to much. The end made up for that though. So, there were, what, six optional bosses in the final dungeon, each one defeated knocked down the hp of the final boss and took away some strength and abilities I think. But you couldn't fight any of them because you would be too worn down to actually take him on. But you couldn't take him on otherwise because he then stood too tall. I seriously fought that fucker for over an hour and still could not take him down. Again, seemingly impossible.

Xenogears. Ramsus and Mieng back to back. One with an ability to knock you down to 1 hp in your gears, the cost for healing, half your fuel (or about). He does it more than once in the fight and you are screwed in the next that comes immediately after. Except it doesn't come immediately after. There is tons of text that you infamously can not scroll through before each fight. Fucking bullshit.

I also remember something about Breath of Fire 3's end boss taking a ridiculously long time to beat but not ultimately being that bad, just a grind.

Jam it back in, in the dark.