Finally got around to trying VD with six people on discord. If you go to previous pages in this thread, you'll see my posts on our set up on difficult under my old Shiva server ffxiah profile. We made some minor adjustments on VD, which added about 4 mins to the overall fight.
Battle time was 10 mins we used two different set ups for our RDM - RDM/BLM (Stun Method) & RDM/NIN (Non-Stun Method).
This was the only job we had change and our RDM stayed /NIN for two of the three fights went were 3/3 on VD. Stun is valuable as noted by others, but not having it didn't cause us to get anywhere close to wiping and the added DPS helped. Our MNKs found Slow II and Elegy enough for them to keep up/recast in time. Unfortunately, due to our available personnel we were unable to have someone on NIN so we ran the following:
MNK/NIN (Empy)- Spammed VS
MNK/NIN (Aeonic)- Spammed SS so when the RDM/NIN SB'd they would make light. Regardless 99999 WS. Could have spammed VS as well and made light with other MNK, either option works.
BRD/WHM (REMA) - Curaga III'd to recover from Spin the Tables & Songs were Mambox2, Honors March, & Minuet. Kept Elegy and other debuffs on. Stayed backline and did not melee.
RDM/NIN (Melee Set etc.) - Debuffs/Buffs (Refresh III BRD, Haste II the squad, toss a heal during Spin the Tables **One fight we had him backline to not feed additional TP to the boss etc. as Spin the Tables heals the boss. Also the RDM silenced the Astrologers and served as additional DPS on the boss.
PUP/NINx2 (PLD PUP) - Each PUP held two of the adds away from the main group fighting the boss.
So to keep this short, the additional Tormentor add on VD we had one of our MNKs solo it @ 80% & 30%. Our RDM/NIN & other MNK held the boss as that MNK killed the adds at those two percentages, we deemed the MNK with the least amount of hate/threat at the time to kill it so boss did not follow him. BRD Curaga III spammed on Spin the Tables. The Two PUP's held two Astrologers & Two Tormentors.
Personal Notes/Opinions:
Difficult spam with the strategy I posted for 6 mins runs might be the best option, especially in a PUG scenario.
I did not attempt the PLD Kite & SMN Mew Method, so I cannot speak on the pros and cons of that strat versus this one.
I would have liked to try this with two well equipped NIN's making light with Shun (Aeonics), and or Metsu (Relics). Honestly, any SC combination to add additional damage would work, I was just throwing out those two weapons/WS's as examples. Having access to additional shadows would be welcomed.