Random Painted Highway: I have Prishe SSB too, but I needed damage here more than Last Stand. Ayame had BSSB/OSB, so she made the team. As for the FUll Throttle, I got the III set since I had no dupes and that set would have guaranteed a win on D???, though I'm a little iffy on sub-30.
Keep in mind I had a 33 second win on XI D??? before. It's not logical that it would take me 8 hours just to scrape 3 seconds off my time, but there yah go.
Anyway, thanks to poster
I_hate_Syldra on Gamefaqs, I was able to get a sub-30 on TYpe-0 D???. He posted a team that I could mimic quite closely, and with some adjustments I got my sub-30 after less than two hours of attempts. Compared to the 8 hour madness of XI, this was almost relaxing. It helps that, unlike with XI, I actually kept improving, with a 36 second win, then 31.XX, then 30.XX, and finally 28.07. It also wasn't a total RNG-fest like XI, just needed to figure things out (like keeping King alive) to get the sub-30.
Eight (LM1+LM2): R4 Iron Fist Ice, R4 Flash Disaster, Fist DMG+ (USB), double ice boost, odin accessory
King (LM1+LM2): R5 Tempest Snipe, R3 Plasma Shock, DMT (USB), double lightning boost, odin accessory
Rem (LM1+LM2): R5 Holyja, R2 Hastega, Gathering Storm (BSSB), double holy boost, earth/fire resist acc
Sice (LM1+LM2): R4 Demon Cross, R3 Dread Weapon, Acestriker (USB), double dark boost, fire/wind resist acc
Deuce (LM2+LMR1): R4 Curada, R3 Shellga, MM (BSSB/USB3), earth/holy resist acc
RW: Chain
Magicites: Lakshmi (MND/HP Boon), Ark (Empower Dark x2), Manticore (Empower Ice x2), Madeen (Atk x2), MAdeen (HP/Fast Cast)
100 magia on everyone in main stat.
Rough Plan:
Eight: Flash Disaster x3, USB, spam Iron Fist Ice, but switch to Flash Disaster for gauge if I needed to refresh Last Stand, USB at the end for damage
King: Chain, USB, Plasma Shock x2, magicite, refresh chain, USB, Tempest Snipe spam
Rem: Hastega, Holyja spam, remain on standby to refresh Hastega after Dispel, BSSB after chain is refreshed, OSB to help skip phase 3, Holyja spam
Sice: Dread Weapon, Demon Cross spam, USB, Demon Cross spam, USB to help skip Phase 3, Demon Cross spam
Deuce: BSSB, Shellga, Curada, remain on standby to refresh Shellga after DIspel, CMD1 if someone has lost Last Stand and needs to heal, otherwise Curada, USB3 when available, Curada spam
I initially had Gathering Storm on Sice and Acestriker on Rem, but found the other way around to be better. Sice needs more gauge to spam USB, and Rem needs to push out Hastega faster.
The key to sub-30 was to skip Phase 3 death and keep King alive. I kept getting close times with King KOed by death, and once I found a sequence that kept him alive, I got the sub-30. What helped was making King drop magicite and refresh chain while in the middle of phase 2, allowing the others to build up and DPS past Phase 3 with Rem OSB, Eight USB, and Sice USB (I was altered to the fact that this is like a mini-AOSB upon refresh, dealing 9999x10+99999 with high chain count; I didn't get quite that much damage when I used it the second time since chain count wasn't high enough, but it was enough to push past Phase 3 along side Rem and Eight). Things got a bit dicey in the middle when Last Stand kept triggering, but Eight was able to refresh in time thanks to IC FLash Disaster and IC USB.
Okay, so thank God that's over. That's 9 sub-30s down, 8 to go. I hope the rest are closer to this, and not the hell that I went through with XI, but I'm not hopeful.