So by the time you make it to the Advanced Rocketry quest line, you will easily be able to make the second tier coil/motor or even 3rd+. Having to make the bottom tier coils/motors for the quest when you'll never use them is a bit of a waste. Other packs solve this by using the oredict for coils/motors instead.

-Coils are: blockCoil
-Motors are: blockMotor

With the Liquid Fueled Engine required by the quest; I made an Advanced Rocket Engine instead. Once again I had to make, and never use, the basic version to complete the quest. These 2 don't already have oredict names so you'd have to add your own via MineTweaker.

This issue was moved by NillerMedDild to NillerMedDild/enigmatica2#336.

This issue was moved by NillerMedDild to NillerMedDild/enigmatica2expertskyblock#416.

I'll get that fixed, thanks :)

What is the highest tier coil? Titanium or Iridium?

Iridium.