I used the eAT-AT about 80% of the time with a secondary AT-AT. If all 3 generators are too far apart i will always skip over the base. At the same time I have been punished badly on 1 far generator and 2 close together ones. Typically on that latter setup i means my main force will only have 40 supply to attack with minus if you have any outlying buildings that i need to put storm troopers on. typically if the defense saves at least 1 shield i will either barely 50% or not at all.