This past week I continued with greyboxing level design, completing the boss room.
I started placing enemies in the map. To test the mechanics of the enemies, I am recreating the Boletaria level from Demon Souls. I put in Navmesh and redid some stairs, as they were too tall and narrow and the default Navmesh would not take them (I made them at least 100cm wide and 0.25 high). I positioned the enemies and tweaked their sight radius (some enemies should not trigger from a distance, so as to catch the enemy off guard for example).
Next step will be to create destructible props so it can hide behind various things (enemies, secret passages, traps etc.)