Bug/Issue Bone Dragon Behavior Exploit

The bone dragon is already an incredibly underwhelming boss, but this just makes things so much worse.

I'm probably not the first to discover this but there's a huge exploit with the bone dragon that can be abused. There's an attack the bone dragon does where if tiles are obstructing its view of the player, it'll spam a barrage of fireballs to break said tiles so it can continue to pursue the player. Here's how you can abuse this behavior.

1. Once the bone dragon spawns, run all the way back to the hill you spawned under at the start of the mission.
2. Head up the stairs and stand right up against the cliff face.
3. Wait for the bone dragon to arrive.
4. The bone dragon will now be right up in your face, but since there's also a huge wall directly in front of it, it will now attempt to break the cliff with the fireball barrage attack because it thinks the cliff is blocking its view.
5. The bone dragon is now stuck in an endless loop trying to destroy a protected wall. You can now walk away freely and cheese it from behind.
6. Repeat as many times as you'd like.

Please fix this for 1.3. Oh, and give that poor dragon some more attacks while you're at it. It desperately needs more than one attack.

Here's a screenshot of what I'm talking about.