Like I stated in another post, the biggest problem with these cheese oil strats is that for now the AI doesn't have any answers to you just walking up to them while chatting. Yeah you can place oil barrels, sure. But also note that you can place a 2 handed character, buff it, rage and then smack Alexander or whatever other enemies before they can react. That is not as effective as stacking oil barrels, might be less cheesy, but it still is. All they need to do is make a proximity trigger to these hostile npcs while in conversation so you can do that. You could then try to sneak in a ranged attack or spell, and that's ok. But straight up walking all over them with a melee character and dancing around is a huge oversight and I hope it does not make into the final game.