Did you have a specific party for fighting Shaolong Guis, Dark Schala? I know my party is completely different as compared to the Long Gui party.
IIRC, my Shaolong Gui party was like this:
Fang/Lighting/Hope
SEN/SEN/SEN (default)
SEN/MED/MED or MED/MED/MED
SAB/SYN/SYN
COM/RAV/RAV
COM/COM/COM
SEN/MED/SYN (or something, I know I didn't use the last one much)
Yeah. Two of them until I got Lightning's Ultima Weapon and started using her for Army of One.
Shaolong Gui Party 1:
Fang/Vanille/Snow
*Syn/Sab/Syn (buffing/debuffing)
Sen/Sen/Sen (essential for the first round of Quake. Switch to it when he stomps or casts Ultima)
Rav/Rav/Rav (Beefing up Break Gauge to kill leg)
Com/Rav/Sab (continue casting Daze; drive up Break Gauge)
Com/Rav/Sab (this is set up twice for ATB cancelling)
Med/Med/Med (precaution; if it's dazed, switch to this immediately to get health back up)
Equip:
Fang: Pandoran Spear/Calamity Spear, Gaian Ring, Genji Glove, Power Glove, Power Glove
Vanille: Malboro Wand, Gaian Ring, Weirding Glyph, Magus's Bracelet, Collector Catalogue
Snow: Paladin/Winged Saint, Gaian Ring, Gold Watch, Sorcerer's Mark, Connoisseur's Catalogue
Another thing to keep in mind is that I started fighting these things while trying to transition between Tier-1 and Tier-2 weapons, so... fights were harder than normal.
After getting used to fighting the Guis and recognizing their patterns, and also after getting Lightning's Ultima Weapon, I decided to change things up.
Shaolong Gui Party 2:
Lightning/Fang/Sazh
*Syn/Sab/Syn (Lightning to cast an En-spell on herself (any En- spell, I didn't care since you're getting Imperil on it) and Fang; this has a purpose if you get Imperil on it)
Sen/Sen/Sen (turtle against the turtle)
Rav/Rav/Rav (Beefing up Break Gauge)
Com/Com/Sab (continue casting Daze; drive up Break Gauge)
Com/Com/Sab (ATB cancel)
Med/Med/Med (heal when monster is dazed -- didn't attach a SEN to this because the SEN will provoke it, bringing it out of Daze, and causing me problems)
Equip:
Light: Ultima Weapon, Genji Glove, Power Glove, Power Glove, Gaian Ring
Fang: Calamity Spear, Genji Glove, Power Glove, Gaian Ring, Gold Watch
Sazh: Fomalhaut Elites, Gaian Ring, Collector's Catalogue, Connoisseur's Catalogue, General's Belt
Way easier with this setup because Sazh's casting speed is slow, slow, slow, omg... it's way helpful.
As for the
Long Guis, I went with... (lol, just trust me on this one because it works)
Light/Vanille/Fang
*Syn/Syn/Syn (quick buff before it does its first stomp or Quake to move onto Tri-Sen)
Sen/Sen/Sen (turn into a turtle to fight the turtle)
Rav/Rav/Rav (drive up Break Gauge quick to get those legs down)
Sab/Sab/Sab (debuff quick to get those legs down)
Com/Sab/Com (hit that thing hard and debuff it) LOL, I ran to my PS3 since that didn't seem right. If someone's SAB, they'd stop debuffing after they finish doing all they could. The correct Optima is Com/Rav/Com. Makes more sense.
Com/Med/Med (healing quickly while maintaining break gauge)
Equip:
Fang: Calamity Spear/Kain's Lance, Gaian Ring, Genji Glove, Kaiser Knuckles, Kaiser Knuckles
Vanille: Malboro Wand/Nirvana, Gaian Ring, Weirding Glyph, Weirding Glyph, General's Belt
Light: Ultima Weapon/Omega Weapon, Genji Glove, Kaiser Knuckles, Gaian Ring, General's Belt
I guess by my weapon selections, you can see that I value buffing/debuffing the most.
As for the first time I downed a Long Gui, I kinda cheesed it and used Smokes and Elixirs since I didn't put the effort into learning a lot about the intricacies of the battle system at the time. I can't remember what I used for that one at all. I think it honestly might have been a Hope/Vanille/Fang party for some reason.