Yeah I took Hymn to most. 90 difficulty still did a little too much damage but w/e it's done.
With SP up, its Absorb ability was doing around 415 damage to me. Missed maybe 1 in 5 times. Think at 50 with synergy, Yuffie was rocking about 4k HP. Get him slowed and it's easy to TF twice before it acts. You'll probably want to Grease Lightning a time or two after you do slow it, though. 90 may need some AAs to finish it if your weapon is bad. I had a +2 VII katana sitting around that she could fortunately use instead of the gimpy diamond knuckles the event pooped out.
Used HotF for RW before Staniv and did fine, though I ran into some difficulty at Chekov because I went in unprepared (R5 Tempo Flurry / R1 Paralyze Shot, don't ask), but still managed to master it.
Steal HP (R5) really made Staniv (and trash mobs) a breeze (used Black Materia RW).
For the 3-man fight, I got lucky with sleeps, and finished it off in about 4 turns (Cloud/Yuffie/Sephiroth).
http://i.imgur.com/5XudDh0.png
Not pictured is Blade Beam (RW) I used; didn't feel like searching out another Black Materia.
Steal HP+Blindga and most of the bosses won't even touch you (Steal HP is there for trash). Set Sephiroth's Black Materia as RW and Sap them as well (all the bosses can be blinded or sapped).
I haven't done floors 3 & 4 yet, but just been having Yuffie throw the pumpkin ball (only 5 dmg lower than rising sun) and with a 243 evasion at 65, she's barely getting hit. auto through to 2nd round of the last stage, drop haste/prot roaming warrior then on boss spam shadow steal till sapped then dismissal spam.
Tossed Edincoat, OWA, and Loner on Yuffie for solos. Death ensues.
I used Steal Power + Steal HP and Blade Beam/Black Materia for RW on Floors 3 & 4. Bosses went down quick and barely did any damage. I tried Tempo/Steal HP + LH on the third boss at first like KongBakPao suggests and just didn't have enough damage with a level 50 Yuffie. My lowest attempt was 10%.
Slap a synergy weapon on her and put her in the front. He'll die quick.
I did Steal Power + Steal HP and LH RW for the second and third solo rounds. Steal Power + Tempo Flurry for the first and fourth. I used Hymn for the fourth solo boss.
For the fourth boss I broke her cap, egged her to 64 (15k tnl to level after 2nd trash round for the 4th Floor), and gave her Loner. With Hymn and leveling after the second trash stage it was obviously very easy.
I had Seph's 1st SB Katana (Masamune?) with a Crystal Bangle++ and Fury Ring on her.
EDIT: Just remembered, Steal Power + Steal HP was a bitch on the 3rd guy because of Para. I'd suggest maybe taking Hymn/Lenna RW so that you regen while Paralyzed. I had to S/L a bunch in order to beat that one as my Haste was mostly wasted if I got para and a poorly timed para could mean SP or Protect wears.
With the above equipment, his Absorbs were doing 1300 per hit without mitigation. With Protect + SP they did 200 and change, with just Protect they did around 700, with just SP they did 400 and change. Steal Power buffed Steal HP was doing 8000 damage and healing for 2300.
Done with Quests... bring on + and ++ so I can have LH always.
Bonus Battles Tomorrow right?
stupid godo all he does is sleep and cure
edit : complaining help, killed it!
I got tired of that shit so quickly. And he ALWAYS cast sleep on the person about to act.
I swear doing the quests is so much harder than anything else. Gaze Gaze Gaze Gaze Absorb Absorb Absorb Absorb
I think I'll toss Luneth in my party for Ultimate with Lightning's RM3 and have him Advance things to death for the lulz.
Gaze missed me every single time lol
I spent half the battle gazed, but I had sap on him almost the entire time so he died easily.