I just did a risk exploration. Fighting the boss I needed to use the facilities/bathroom/toilet/watercloset about 15m in. After 45m I had no idea how much further and the discomfort had increased enough that I decided to screw it and closed the game client.
I had no idea how much further I needed to go. I also had no way to pause the fight because of RL. If you're the only player in a single team map it should be viable to Pause the game. At least some type of boss health bar so I know if I am at 53% boss health or 3% boss health.