Use a portal gun to drag a Carmanite Golem spawner somewhere and set up a grinder for iron.
Or set up a vanilla iron golem farm thing.
Drag a skeleton spawner to the nether to spawn wither skeletons for coal.
Use some form of automation, to combine the two into steel.
Also the GT steam turbines in 1.5, the Reactor Turbines from Atomic Science if that is installed.
Steam engines, power magma crucible on cobble (Igneus extruder) putting that into a GT thermal Generator to not need steel.
Lots of options.
GT machines can run directly off steam, if you feel so inclined.
Or set up a vanilla iron golem farm thing.
Drag a skeleton spawner to the nether to spawn wither skeletons for coal.
Use some form of automation, to combine the two into steel.
Also the GT steam turbines in 1.5, the Reactor Turbines from Atomic Science if that is installed.
Steam engines, power magma crucible on cobble (Igneus extruder) putting that into a GT thermal Generator to not need steel.
Lots of options.
GT machines can run directly off steam, if you feel so inclined.