I’m doing runs with 5 wizards.
Stat-wise:
-> Full INT for good gears + good party + good healer. If your healer sucks you die.
-> Balanced CON-INT for average parties + survivability.
-> Full CON not really recommended but can be good for staying alive or if no one else in the party has high CON and you’re a chrono3-linker3.
Builds: I’m focusing mostly on Elementalists when it comes to DPS.
-> Wiz3 Ele3 Warlock3: Great dps, especially if you can combo Armor Break (Musketeer/etc) + MDef Reduction (RC/Linker) + Rune of Ice (RC) + Hail, you can also pick Lethargy Lv.15 to reduce 15% from Velcoffer ATK or Magic Shield Lv.15 to reduce damage.
-> Wiz3 Ele3 FF1 SM2: Decent dps, each Shadow Thron (w/ attribute) can deal ~600k+ damage on Velcoffer, you can heal yourself, Lv.1 Blood Bath can be more useful than you think, Hexing/Curse increases SM damage. SP is actually a huge problem with this build if you can’t jump the SP-drain moves.
-> Wiz3 Ele3 RC1 Sage2: Decent dps (I feel it’s weaker than the other two but couldn’t really test). One big disadvantage of this build is how all skills needs charge time so it’s hard to dodge skills, you rely a lot more on your healer skills. On the good side you can buff your own damage and keep a good uptime on RC buffs and MDef Reduction if your party have a Linker3Thaum3 and no Chrono.
-> Linker3 Thaum3: Spirit Shock damage is actually really nice. You can link yourself with Wizards for SPR+INT buffs. Compared to Chronos your party lacks mobility and Lifeline uptime so you might need a good healer (and/or good party as whole) to survive when you’re on cooldown. Shrink Body helps in some parts of the run.
-> Linker3 Chrono3: This is great for party survivability and for sustaining damage output. Most of your buffs have 100% uptime and some skills like Slow and Stop might be really useful at certain parts of the run.
Other builds I saw:
-> Pyro3 Thaum3 Enchanter2 (Forgot if Pyro2 or 3): Great buffer for AA parties and can be very strong.
-> Non-RC LinkerThaum or ChronoLinker: I don’t really recommend this. Parties without Rune of Protection gets knockdown A LOT. You’ll need more skills or gears to compensate time lost and extra damage taken.
Builds I tested but have no team:
-> Link2 Thaum2 FF3: Featherfoot 3 can be great if you can maintain aggro for tanking. Levitation cancel most of the damage you take from Velcoffer. Kundela can do decent damage with low cooldown on boss. Blood Curse and Enervation can be really useful as well. You might actually get annoyed at how long Bone Pointing stays on ground after being cast. I’m actually curious of how well DPS-oriented variants would work.
-> Anything - Onmyoji2: Don’t even bother, reset out of it please, you’re doing your party a great favor. Leave this somewhere else, VERY far from Velcoffer or any content where enemies have high defense. I’m saying this after testing it with 11k M ATK with buffs.