So, I suggested it in the comments of S2E2 of your LP, Iskandar, but I'll suggest it here too.
In E3, you should start Aura Cascade. You should have started with the Encyclopedia Aura, yes?
On the left hand side is a quests-like tab. It's very glitchy, showing some completed quests as incomplete sometimes and then not giving rewards when completing some others, but it's a helpful start.
First thing you'll want to make is a Cascading Processor, a Burning Pump, 3 Aura Nodes, and a couple Aura crystals. Stick a node on the ground, the processor and the pump next to that. Make a cobble stack about 5 high, and use it to put one node directly above the lower node, and a second above the pump. Use the crystals on any node. When you want to double some ores, throw them on the ground near the processor, throw a piece of coal next to the pump, and come back in 5 minutes.
Step 2: Passive power.
This isn't something covered in the Encyclopedia Aura. You'll need violet aura crystals, a shit-ton of aura nodes, and some dye, wool and iron.
Use the dye, wool, and iron to make 4 conserving aura nodes, and 1 aura capacitor. Once you have these, remove the pump and nodes by your processor, except for the one right next to it. 15 levels above the node, place a node (it's the farthest they'll connect). Put nodes in all 4 directions of the upper node (making a horizontal + out of 5 nodes). Then make 4 or more layers of those + shapes above that (touching is fine). That's 25 or more nodes, by the way. At the top, put the capacitor above the middle, the conserving nodes next to it (for another + shape), then put 4 more nodes to make that top most layer into a square. Set the capacitor to 100 (I think; this was not my own research), and put a violet aura crystal into one of the conserving nodes. The violet aura will trickle down, expanding and multiplying into some thousand aura by the bottom, which will then fall the 15 levels into your bottom node, producing amazing power amounts, requiring no coal.
Of course, in order to make all this... you need about (just guessing because I don't have the recipes here) 30 gold ingots, 60 iron ingots, 11 dyes, 10 wool, and however much coal was needed to process that. You could cut it down to just the top layer, and remove the 25 nodes in between, but you'd have to move the top layer if you decided to add more and you'd only get about 1500 aura per second.