#Raiding

What is the boost effects for slotting Jewels in Cydroids for Raiding?

Here is a helpful list of all the Jewels that can be slotted into a Cydroid, and their respective boost effects: 

What is the most effective method to collect as much e-thers as possible with little effort?

There are various ways to collect E-Ther. These include raiding, buying tiles on E-Ther hotspots, buying of 4 tiles to neighbors with a lot of Essence and raiding etc. But which of these is the best and most effective?