As some people have mentioned, the wiki pages these days are a bit lacking on the details and strategies of delve 1 and 2 (the problem is more prominent with delve 2) and not everyone wants to sift through over 300 pages of discussion.
Delve I
Morimar Basalt Fields
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Zone Buff: Attack Boost
Recommended Party Setups
i) DD DD COR/DD WHM BRD GEO/SCH/RDM (stunner)
At least 1 MNK or BLU is ideal for this zone to take care of Volatile Matamata with ease. The other DD can really be anything due to Tojil taking enhanced damage from all damage types.
Each stunner has its own advantages and disadvantages
GEO: can give massive buffs/debuffs while stunning, has no way of curing itself, no access to general debuffs/dispel. Has to rely on being double marched and hasted.
RDM: Haste II helps greatly with stun timers, brd needs to focus less on stunning. Can silence/paralyze/slow etc. Might get distracted debuffing and miss stuns
SCH: can AoE Regen V, dispel, has fastest recast with stratagems provided they are being hasted and marched. No access to silence and other debuffs.
It may be wise to bring 7-8 players by putting a RDM for debuff/haste purposes in a 2nd pt, and a PLD to aggro/hold monsters in order to reduce stress from having adds during NMs on newer groups.
ii) Low man: MNK BRD SCH (+GEO)
This zone can be cleared with the following three jobs, and be made trivial with the addition of GEO. The BRD will need to mostly main heal while keeping the SCH and DD haste (+songs). MNK works particularly well as a DD due to its large HP pool and offensive/defensive capabilities.
Notorious Monsters
1. Volatile Matamata
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2. Perdurable Raptor
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3. Shimmering Tarichuk
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Overall NM 1-3 strategy:
The person holding Volatile Matamata should do so immediately due to the ~5 minute preparation time. Meanwhile, the other DDs can fight Perdurable Raptor, and then Shimmering Tarichuk to avoid having all buffs removed via geist wall before fighting the raptor. If the matamata happens to be ready before both NMs are dead, anyone else designated to fight the matamata should untarget the current NM ~15-20 seconds before the matamata readies the engage TP move to avoid having hate on the current NM.
4. Tutewehiwehi
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5. Kurma
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Overall NM 4-5 strategy:
Before fighting, make sure you've recasted all the appropriate WHM buffs that were dispelled from fighting Shimmering Tarichuk. NM order doesn't particularly matter, just don't use nightingale/troubadour if you plan on fighting Kurma first. If both NMs are together, it's important to note that Tutewehiwehi IS sleepable, while Kurma is not (unconfirmed?).
BOSS: Tojil
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Foret De Hennetiel
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Zone Buff: Ice Spikes
Recommended Party Setups
i) MNK/RUN or BLU/RUN DD DD/COR BRD WHM SCH/RDM/GEO
MNK or BLU is mainly for effectively dealing with Faded Cracklaw, the other DDs don't particularly matter.
Like Tojil, each stunner has their own strengths and weaknesses, but bringing a 7th person (RDM) may be useful for massive debuffs on the Uragnite, as well as casting Haste II on the stunner.
ii) Low Man: MNK BRD SCH (+GEO)
iii) Mage Setup: SCH/GEO(2x) RDM/BRD
Any combination of those 4 jobs should work fine for a mage setup, but a melee RDM or BRD may be particularly useful for dealing with Divagating Jagil, instead of having to constantly change nuke elements. Faded Cracklaw can be dealt with by nuking and then meleeing. I'll let a more seasoned mage (Lyramion?) go into detail about the boss strategy, but I imagine it doesn't involve much more than spamming thunder nukes and spreading out.
Notorious Monsters
1. Faded Cracklaw
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2. Aberrant Uragnite
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3. Divagating Jagil
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Overall NM 1-3 strategy:
In order to maximize time efficiency, the MNK(or BLU) can go off with the stunner to fight Faded Kraklaw while the rest of the group takes on Divagating Jagil. Once Kraklaw is dead (shouldn't take more than 2 minutes) the DD can join the rest of the group on jagil, and the stunner can pull Aberrant Uragnite and sleep it by the group, gradually applying debuffs to it. Once both are dead and Aberrant Uragnite has enough debuffs on it, a mage can impact it on engage.
4. Nerrivik
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5. Krabakarpo
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Overall NM 4-5 strategy:
Again, NM order doesn't particularly matter on this zone. Both can be slept so the mages/bards can keep one NM slept while you fight the other if they happen to link each other.
BOSS: Dakuwaqa
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Ceizak Battlegrounds
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Zone Buff: Evasion Boost
Recommended Party Setups
i) DD DD COR BRD WHM GEO/SCH/RDM
DDs that work well in this zone are: SAM (with bow), BLU (with requiescat), THF, DRG, DNC. COR is also recommended as long as they are able to melee, as they can deal quite a bit of damage spamming last stand on Muyingwa and Mastop. Chaos Roll and Hunter's Roll are also very useful in this zone.
GEO is actually the ideal stunner for this zone, due to stun not being as important compared to the other 2 zones. They can apply frailty (+fury) to all mobs and either frailty or torpor (they should still probably stand out of for mastop/muyingwa) for muyingwa depending on DDs accuracy/other buffs. That's not to say that you can't use a RDM or SCH stunner (Muyingwa actually has the least delay between TP moves so alacrity stun is quite useful too), but it isn't as important so you should take advantage of GEO buffs.
ii) (not really) PLD RNG RNG RDM GEO BRD
If a group really wishes to, they can use a PLD RNG setup and get super buffed by flurry 2/luopans/minuets/preludes but overall it will still be significantly slower than a melee setup. RNGs should alternate decoy shot to avoid pulling hate on the boss. NMs 1-5 are probably irrelevant cause RNG can either melee and WS or shoot and WS.
iii) Lowman: SAM BRD SCH (+GEO)
I'm not too sure other DD would work for a lowman setup due to Mastop's mechanics, perhaps a BLU using requiescat could balance damage with itself. Whenever I solo DD Mastop it ends up taking consistent 10k+ Apex and Namas Arrows, though. SCH would probably be better than GEO in a 3 man setup due to its healing power, RDM would probably work too. GEO as a 4th is always recommended, of course.
Notorious Monsters
1. Unfettered Twitherym
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2. Supernal Chapuli
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3. Transcendent Scorpion
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Overall NM 1-3 strategy:
Order doesn't really matter, just fight them in the order they arrive. If there are multiple bunched together, scorpion should be last priority due to the lengthy nature of the fight relative to the butterfly and chapuli.
4. Mastop
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5. Tax'et
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Overall NM 4-5 Strategy
The order in which the NMs appear is irrelevant, just go for whichever one shows up first. If both are together and link, Tax'et should be slept with a dark based sleep while the party fights Mastop. Leaving Mastop idle is a bad idea because it can wake up and do a slowga/breakga with a very large radius. At worst, tax'et will just get a few melee hits off on you. The BRD can also apply songs to tax'et while its asleep just to make sure that its first tp move is exuviation.
BOSS: Muyingwa
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Delve II
Yorcia Weald
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Zone Buff: Magic Evasion Boost (?)
Recommended Party Setups
2x Slashing DD, Slashing DD or COR, GEO BRD WHM
SAM and BLU work well in this zone due to their skillchaining capabilities. Obviously other two handed DD work well too but the easy of creating Light from Fudo->Fudo makes everything die really fast. The COR is welcome to DD all NMs except Hyoscya and Wopket. This zone is doable without a GEO, but Attunement + Vex make Hyoscya one of the easiest NMs in the zone instead of being the hardest.
ii) SAM COR GEO GEO WHM BRD
This is my personal setup that I use when I multibox with my friend. He uses 2x March+Madrigal with Fury/Frailty at all times and Acumen/Malaise for enhanced SC damage. He switches to Torpor for Ircinraq and Attunement/Vex for Hyoscya+Wopket. I use Allies' Roll (SC DMG+25%) and Chaos Roll and spam 4 step SCs on all NMs except Xag'Nar. This setup is obviously not meant for people trying to clear it for their first time, but rather people trying to put it on farm mode. Of all the setups I've tried, this is by far the fastest.
Notorious Monsters
1. Xag'Nar
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2. Laevvid
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3. Morseiu
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Overall NM 1-3 Strategy
Xag'Nar will be the first NM you meet in the first room after the initial path upon zone entry. If you have a PLD to aggro, have them aggro everything in the room and you can pull Xag'Nar off of them with blind. If you don't have a PLD, someone can aggro everything in the room and the BRD can horde lullaby the monsters. You can either kill the adds before or after Xag'Nar, depending on your preferences. Don't fight them at the same time though, as every single add has a very large sleepga AoE.
In the room where you aggro Xag'Nar, there should be a small path to the southeast leading to another open area. Someone can pull Morseiu from there and kill it. Sleep everything that links with it again. After both NMs are dead, progress North to another large open area filled with mobs to fight Laevvid.
4. Ircinraq
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5. Hyoscya
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Overall NM 4-5 Strategy
Pull Ircinraq to the mouth of the pathway of where the wall break occurs and fight it there, obviously taking care of adds too. Ircinraq is fairly difficult to sleep, so if NT has already dropped you'll need to kill the adds after you kill it. From there, kill the 5 monsters just north of where you fought Iricinraq and take camp there. I generally stand by the tree and get ready to voke Hyoscya as it comes in. Have someone pull Hyoscya (I like to pull on WHM in PDT so I can run to myself on SAM and cast auspice and STR-Boost until it gets there) by running north to the dead end (where boss wall break is) and turning right and running all the way down to the fork, where Hyoscya should be present at one of the sides of the fork (generally the right side). Have the BRD ready to sleep all adds as you run back to the open area where the party is camped out. Once Hyoscya is dead, the boss area is right in front of you.
BOSS: Wopket
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----Under Construction----
Posting this here now while I slowly edit in the other zones since this is taking a lot longer to write than expected. Feel free to add in your own information and I'll update the OP.