I was pumping lava out of the nether for a line of about 8 magmatic engines.
As I got further in, with the ME system, rednet, and quarries, I had aproximately 18 magmatic engines each.
Created fission reactor... got tired of not paying attention and running out of tin for deuterium cells when almost all my tin was being used for a massive space construct project.
Created a lava ocean world using mystcraft and transferred my pumps from nether to there and added another row of magmatic engines.
Magmatic engines require the least maintenance as did Geothermal on IC2... regardless. The machines may have changed but energy production is and has always been quite easy.
The only thing I can see changing during this time is a persons own experience on generating energy and it becoming easier for you to figure it out.