Almost all the endgame doppels are only in the final two red doors, though, so. The others are... Darkonium Marisa (1/256 lol let's not), Unpolished Mirror, Mahesvara, and Dragon, but dragon seems fairly rare to find outside of the red door. ...it's fairly rare -inside- it too, actually, but. XD
Unpolished Mirror can help make one person nearly immune to magic (Yoshikia + Magic Null armor is 70 null (miko = 60 null?), unicorn 20% reflect, rod 20% reflect (maybe 40%?), mirror 20% reflect), which is alright, but unless you want to be spending 200 pow on Moonlight Mirror it's eh.
Mahesvara is... okay, actually, Mahesvara is -really- nice (Star lgt/drk, divine/diabolic breath, some decent moves, star dispel... but most importantly +1 Meditation?!) and fairly common to find in the final dungeon's future-y area. And Dragon is actually pretty great, but it's kinda rare both in -and- out of the final area. But dragon lifeblood drop makes some nice stuff so farming isn't a bad idea...
Speaking about red doors, they aren't actually too bad. Demiurge takes a little luck that I'm not murdered too fast but I can definitely kill it, and apart from that, Bahamut's the only scary one. I can't kill bahamut z.z Maybe this is the time breath armor is actually worth equipping, put that on my sword user and I'm set. edit:nvm ambivalence is fine
...anyone know what drops scarletite? In DoD it was the Yukkuri Emperor but not here.