They breed quickly down there in the dark, but perhaps we can slay them even faster.
„
~ The Narrator on entering a Skirmish expedition in the Warrens
The Warrens is the third dungeon that can be explored. An incredibly ancient system of aqueducts and tunnels built for unknown purpose, it is now a corpse-choked cesspit that houses the ravenous, disease-ridden beast-men known as the Swinefolk, and all those deranged or monstrous enough to ally with them.
While the Ancestor was trying his hand at blood rituals, he used the ancient Warrens as a dumping grounds for his failures and underwhelming results. By the time the Heir arrives, the Warrens are now home to the descendants of those experiments called the swine, a warrior race of pig men whose only desire is to butcher and feed on any human they can get their claws on.
Because the Swinefolk are all hybrid Human/Beast monsters, the Bounty Hunter and Hound Master are helpful here, as well as trinkets that deal extra damage to Human and Beast foes.
Provisions
Antivenom is essential for encounters with carrion eaters and spiders that are abundant here
Medicinal herbs are extremely useful, as they can be used for three curios (Dinner Cart, Makeshift Table and Moonshine Barrel). Unusual debuffs (such as those that halve received healing) can also be cleared with herbs.
Bandages are very useful due to prevalence of Bleed traps and attacks. They can also be used to loot the Rack of Blades curios.
Torches are not necessary to stockpile in large quantities, due to short corridors. They can, however, be used to purge a negative quirk with a Pile of Scrolls.
Skeleton Key is occasionally needed for locked chests
Bring multiple shovels
Party Composition
Bleed attacks are extremely useful, blight less so due to high resistances. Any hero capable of stress relief is recommended as the Warrens have more dedicated stress-damage enemies than any other location. Heroes proficient in scouting and resistant to disease can be invaluable for reasons noted below. In terms of their defenses, enemies here tend to be highly resistant to blight, but still vulnerable to bleed. The Hound Master is especially useful here with his extra damage to Beast enemies, multiple bleed attacks, and Target Whistle, which can reduce the PROT of tougher enemies while also marking the target. The Hellion is also useful as her attacks cause bleed, and reach back rows.
The most commonly encountered enemy type is Beast, with many of the enemies having a secondary Human typing.
It's also worth noting that due to the type of map layouts common here, scouting is more useful here than in other location (3x4 quadrilaterals can be almost fully scouted on first room entrance).
Jester can be useful for a solo-finale combo to blow up Swine Choppers and other high health tanks.
Notes
In order to avoid Disease, it is typically best to kill smaller enemies quickly, as they are more likely to spread illness. Stress damage enemies such as the wretch and drummer should be dealt with swiftly as well. When dealing with the Swinetaur, it is wise to clear all other enemies first as this will force him to stay in the first rank where he can't use his strongest abilities.