You don't have to fight, you can do anything. It should be noted that ending your turn in a space with monsters is often a death sentence.
This is the primary piece of advice I give all new players to this.
The game we played without it left us wondering how in hell's teeth the FAITH players could ever win. The second game we played now fully aware of it, and we are now wondering how in hell's teeth the Sin can ever win
Looking forward to figuring out some deeper strategies in our next encounter, but yeah, you don't have to fight... but it's gonna hurt if you don't...