Building 50k to 100k Espionage ships to raid with is the fastest way to raid out all defenseless and fleetless planets. Could take hours to raid a free resource area with LC. This raid method does use more fuel than LC raiding, you usually break even on fuel, however a very fast way to grab up metal and crystal. IPMing and Probe raiding go hand in hand, clear out defenses with IPMs, you can profit for a month with probes off it. This is my choice of raiding Personally, I like to get things done with speed:)