Planning my Velius party.
So, a couple options. The Arch Demons have 38000 HP or so. I have resources to craft Meteo AND get Valefor to R3, and with 5 charges of strong MT I would only have to deal ~7600 damage with each charge to take care of them with MT alone. That sounds very worth it. I can also hit their Elemental weakness with either WoL or Agrias' Record Materia, so I don't necessarily need to slot Diaga (Though that may well be a wise idea anyway).
So, let's assume Valefor and Meteo hit that (with buffing, not unreasonable). That leaves Velius himself with 197k. That seems like kind of a lot of damage to deal before I lose a turn medal, but OK. He's vulnerable to poison at 3.2k per tick, according to the Wiki, so that can help me out quite a bit with turn efficiency. He's not actually weak to poison, though, so it's not worth crafting Bioga. But, Zack has a damage SB, and can use Tempo Flurry AND Venom Buster, so he can be my status workhorse. Hmm. So, in light of that, I think I'll go
Ramza (F4 Magic Breakdown, R3 Indoor Spell?), Katana Damage 1.2x
Zack (R4 Venom Buster, R5Tempo Flurry), Holy Attack RM
Terra (R4 Waterja, R1 Meteo) Dualcast Black
Yuna (R3 Valefor, R4Curaga) who cares
Aeris (R3 Shellga, R4Curaja) who cares
SG/Stoneraskin RW
It'd be nice if I had Garnet's RM3 (Dualcast Summon), or Cloud's RM3 but oh well.
I don't know exactly what I'll put in Ramza's second skill slot. Mana's Praen is an option, and it will almost guarantee my 5 Meteo/Valefor charges eat through the Arch demons. Lifesiphon is probably the better option, though, since Throw Stone is 10k+ damage with turn cancel. Depending on my survivability, it may be worth putting Shellga on Yuna and giving Aeris Water of Strength to squeeze more damage out of Throw Stone/Air Strike, too. This SEEMS like my best setup at the moment, anyway. I could also swap Zack for Kefka, but the added damage from Kefka using Mana's Praen and Waterja (I'd likely slot Ramza with Mental BD, too) would have to outpace 3.2k damage a tick + Zack's occasional Air Strike damage to be more efficient, and... well, hey, it may! I've never had to pay attention to POZN before so I don't know how much damage that actually is a turn, and Mana's Praen on 3 characters casting off of MAG before I get the SB gauge to use the Witch's Hat SB is potentially really freakin good. Especially if I slot Ramza with MenBD and Aeris with Diaga. The issue here I think is that I only have 3 natural 5* rods or staves and no FFT rod synergy so by default one character is going to be dealing suboptimal damage.
I think my rod situation, and not knowing how much healing I'm going to need, makes POIZNZack better for a first attempt. I'll keep plan B in mind for a second try though.