system
Given the following post, respond as if you're commenting on Reddit:
human
[40k] Which race stands the greatest chance of outlasting (or even defeating) the Tyranids?

I think the Dark Eldar and Eldar stand a good chance, as their craft worlds enable them to actively avoid the Nids. 

Orks can theoretically multiply wherever they set foot. Necrons I don’t think count as biomass. 

So, thoughts?
gpt
Necrons and Daemons have the best chance of defeating Tyranids, because they don't contribute to their biomass.  
  
Necrons probably have the best chance outliving them, because if a tombworld is just floating somewhere, Tyranids would go around it.