^This. After I assure plenty of food I get my smeltery running, them dig my mineshaft... When I get some redstone and enough iron, copper and gold I build a SAG mill, Alloy Furnace and a couple of Basic Capacitor banks, charging the banks at first with 4 survivalist generators.
After I get a good surplus of food I covert the Generators into the Culinary variety (toast and baked potatoes make a good fuel
). The EnderIO machines take the place of processing ores in the smeltery due to the bonus items you get if you keep flint in the SAG mill.
By this time I'm about 4-6 hours into the new world because I usually have to search for a Natura Redwood to live in, hollow out the ground floor and downward until I hit root-wood which I use for flooring and/or charcoal, then dig to Y=50 and carve out the production part of my base.
I should point out that I play on Direwolf20 and Infinity, but I usually add Iguana Tinker's tweaks to make things more interesting, and in Infinity use Agricraft to optimize my seeds to 10,10,10 so I can harvest a full stack from each 4x4 plot.