you say easy? not easy you can't build a nullifier for the emitter on a spot that is surrounded by void but I did take out the phantoms first, then I thought the totems needed to be charged and I charged them, but then I can't prevent the creeper from getting to the spot for the forge and not much build space to be able to build more stuff while having collectors to provide connections.
Edit: beat it,
Spoiler
but after using 2 mortar to defend and only using totems as I can't afford to charge all 12 of them. First I got all 10 energy upgrades, then got all energy storage upgrades, then the speed upgrades, then the build faster upgrades and then 1000 aether on forge blackhole to be able to nullify the emitter and win.