

The final reason as to why the Swine boss is the easiest is because even if your team members gets marked, the Swine Boss himself is very slow so you can easily heal anybody who is on Death's Door with a Vestal or Occultist.

After this, Wilbur will gain an attack that stuns the entire party, but most of the time it will not stun everyone on your team. So killing the Swine boss is the best course of action when you fight him.

This is because if you kill Wilbur, the Swine boss will become enraged and constantly hit the entire party with attacks that will always hit for high amounts of damage. But like I said, they're a bit high powered for that green dungeon and came prepared. I killed the Swine Prince under pretty good conditions too. Most people will kill Wilbur on their first try because of this, however, this is a very bad thing to do. But this party was level 2 fully (to that point) upgraded, and that particular composition is basically put together as a super efficient dungeon strike force. If there aren't any marked team members, he will use a move that has a very high chance to miss and hit for a moderate amount of damage. Just go all out on the boss and heal when needed. Because of this, he has another enemy that stands behind him, called Wilbur, which marks your team members at the start of the round. The swine prince will start aoe stunning and damaging your whole party every round if you do. Another reason is that his main form of attacks rely on having a target marked. First off, the main boss is in the frontline of the opposing team, meaning any frontliners will have a very easy time hitting him. He's not very difficult to defeat if you play your cards right. The Swine boss resides in the Warrens dungeon.
