Immersive Engineering Mod

A timeless classic, Immersive Engineering is a tech-industry mod that adds many multiblock machines, power sources, animated windmills and waterwheels and awesome weapons like the Railgun and the Revolver.

It's a complex and difficult mod to understand and work with, but the challenge only makes it all the more interesting; To get started, craft an Engineer's Manual and keep it stored in your inventory when working on the mod's contents. Then make an Engineer's Hammer and build a Coke Oven and Alloy Kiln, both made of simple materials like clay, sandstone and bricks.

With a Coke Oven, you can make Coke Coal and free charcoal out of logs. It's slow, but effective, be sure to make multiple. You'll also get Creosote Oil as a byproduct, so be sure to store it and use it to make Treated Wood. 

The Silo and Tank multiblocks allow for massive storage of items and fluids respectively, make good use of them. 

The Metal Press is also an incredibly useful tool, allowing you to make plates, cables and many more items in a cheaper and more effective way. You can connect it to conveyor belt lines to move items around automatically.

Having an array of Blast Furnaces is also incredibly important, as the best content this mod has to offer is gated behind Steel and you can only make it in those.