[DINKDINK]

>If I could isolate and attack individual members of the cluster quickly, I could begin to leverage their role in the cluster as they join, convinced that a single block must be true.

To do this you would need to have the equivalent hashing power of the network. Peers expect an nominally equivalent amount of Proof of Work for the difficulty adjustment. You would also need to guarantee that the peer connects to _no other_ peers

Your thinking is good adversarial thinking but it's already covered in the protocol.