Ok, who is responsible for this mess on my screen? :-)
First, did I overlook any ore mines, or does this map not have any?
Second, I actually thought that having nice large platforms at height 10 to operate from would give me a place to build. They get overrun by creeper at varying points, but generally by a little over a minute. And there's a *lot* of emitters.
When I first saw this, I was thinking "nullifier daisy chain from PZ to PZ". But that failed me.
What's the hint for this one?