I use Buildcraft and Indistrialcraft together. I noticed that geothermal generators are relatively cheap, and magma is absolutely abundant in the nether. I used the pumps from Buildcraft, along with teleport pipes, to send enormous amounts of magma/energy from the nether into the overworld.
Fast forward at least a year, I just started playing DOOM for the first time. What I was doing is basically the plot for DOOM.
I'm starting to think this mod can take advantage of that funny coincidence, perhaps some surprises come our way if some conditions are met that show we are farming the nether for its energy resources.