That's why I said kotl would take a while, but what type of situation are you talking about now? Before I get confused and argue for another, because what I'm talking about is countering a rat push, they said you port in with NP, make trees and necro units, and leave them to kill the tower, and they said Slardar couldn't do anything about it, I was pointing out he could and a few supports could also if needed instead, because they were focusing specifically on just saying how you can't counter rat pushes well as Slardar and WK.
Although now re-reading it, I'm assuming you meant Wrath of Nature and NP porting in to gank?