Accidentally came across a glitch during a casual playthrough. If you have your leader go down in front of the Scarab and don't revive him the Scarab will keep attacking his body, allowing you to just keep your army stationary off to the side. This might also let you skip destroying some of the power nodes.

Nice find, will need to try and implement this strat!

I couldn't get this to work, any more tips?

you shouldnt need to do this its slow to do that i can help you with any strats you are unsure of feel free to msg me anytime