you are beggin for problems.... To bad I am to awesome to care. What imperial propaganda has you been reading?
There is literally no advantage any faction has that Tyranids or Necrons cannot counter or altogether circumvent. Leviathan is a SCOUT fleet and the galaxy is struggling just to hold by. No race in the galaxy knows how to permanently stop Necrons, who are so superior technologically it's laughable. >Try to beat Tyranids or Necrons with psychic power Yeah... good luck with that.
Dude They literally bend reality to their whims without even knowing it If a klan of Orks say 1+1=3, it is That's the rule of the WAAAGH!