Also worth trying out is Blood Magic and it's Lava Crystal. Most people go straight for lava powering systems and tell you all about the Serenade of the Nether, and it's pretty sweet, I won't lie. But earlier then that is a T1 item called the Lava Crystal, which consumes 25 LP for one "smelt" in a furnace, aka the amount of power needed to smelt one item in a furnace. Coal is worth 8 smelt, wood 1.5, etc etc. But while Lava is great, not every system will allow it's use. But the Lava Crystal works in anything that uses "generic furnace fuel", so powering anything with a bit of blood is easy if you can use normal furnace fuels to power it. Best of all? It won't kill you if you run out of LP, just make you nauseous. Hence why when I finally end up doing my bit in Refuge to Regent Challenge, I will allow for somewhat techy things, if I power then via arcane means.