I decided to try and take out the goblins with barrels and had fun destroying the entire temple with two fire arrows. Lots of fire, jumped to level 4 immediately.
But doing so completely breaks immersion. "Pardon me goblin boss I'm going to put these smokepowder barrels right here next to your throne. You don't mind, right?
To balance this out they need to:
1. Make placement checks. Someone needs to ask why you are rolling a barrel right in front of them.
2. In 5th ed smokepowder is cursed. It just goes off or fails at random times -- this was the agreement that other gods demanded of Gond when he gave the world smokepowder. You need to risk blowing yourself up just by putting one in your pack.
