Again, I like the idea of barrels and surfaces, but when they are better than spells...
In my Afflicted Fan Fic, as I was writing it, I used a keg of gunpowder to make a battle rather interesting. Marli and Barton and crew were facing the PCs, 3 custom and all origin but Wyll. I played it out with TT rules and stats. Good fight, even with a party of 7. I used Bandit stats for all of the group except Marli and Barton. For them, I used Bandit Captain stats.
Barton went down, so I had Marli lose it. The PCs were within 10 feet of the keg, but so was most of her crew. She launched a fire arrow and hit the keg. BOOM! Dex save throws for half damage. 7d6 damage. Fire burned for 1 round. 29 damage, I rolled. Killed Marli's crew, for the most part, but took out several of the PCs. They weren't dead, but they were dying.
I used oil on the ground during the secret tunnels fight at the grove against Gresh and his goblins. I did pretty much the same thing but said it was 4d6 instead for damage. Several PCs were standing in the oil. Took 15 or 7 if made Dex save. 3 goblins and 1 goblin captain suddenly became much harder to beat, even with 8 party members, 3 custom and the 5 origin with Wyll now included.
The point. Well placed traps using barrels and surfaces is fun. I could see someone rolling a barrel towards an enemy and shooting it, but throwing? No. Sorry. Even if you are strong enough to lift a barrel full of anything, throwing it even more than 5 feet/1-ish meter is ridiculous. It might work in a game where you are becoming a god, but it doesn't work in a game like this.
