The ruins are the dungeon where the Crusader is at its best. He is also incredibly resistant! Crusader

His stun works pretty well against enemies that generate a lot of stress.

His affliction skill does not do as much damage as that of the plague doctor, but it is not very far when we consider the debuff.

I really like the Abomination in this dungeon. What works best here is afflictions and bonuses against the undead. The ruins are a dungeon filled with undead enemies that have tremendous resistance to bleeding. The armor grants your hero +15 protection and +10 dodge! Stack of Books

The hero recovers 10 stress and 5 HP (50%).

The fountain helps your hero recover 20 stress and 12 HP! The altar rids a hero of a negative quirk! You open the decorative urn and receive treasures! The confession booth helps your hero recover -30 stress! The hero receives a +20% damage bonus until next camp instead. The altar of light empowers your hero with a +30% damage bonus until next camp! You find gold or gems (x2) on the alchemy table! The necromancer is easy and the prophet isn’t too difficult with a good party composition. Most monsters are of the unholy type and are very resistant to bleed damage, but vulnerable to blight damage.

I usually select them when I need an easy week to recuperate.

Darkest dungeon optimal warrens party