Board Thread:Warhammer 40k General Discussion/@comment-7186329-20130329164207/@comment-7699236-20130401184039

Orks coudn't loot from Tyranids (in any way I could think of anyway, but with Orks you never know...) and would run out of ammunition and have to get down and dirty with the 'Nids, which is what most people want to avoid, and would get wiped out. Also, they don't know about the Hive Mind, and are unlikely to destroy the Hive ships. Plus they don'y reproduce as fast.