I do not run the epic forge at the moment, but I am at a level where I can get it. As it stands now all my arrows in my economy that can stay green are green. When I get the epic forge I will plan my economy so that my arrows will stay in the green. Coal is used a lot and needs to be managed well, but with a buff we would be taking away the need to think about how to balance our economies. Which is part of the game. Like I said before, we might as well ask for a zone buff that buffs everything then we can switch our brains off completely. Yes, we do have buffs for other production lines but we can gather coal in more ways than any other resource. Its just all down to management.