u/Allforundeath

Most people underestimate these demons because they don't quite reach the CR that the Pit Fiends and Solars do. The thing that makes them truly threatening is that they can afford to die. You kill a Solar? Great, you took out appropriately 5% of the entire population. You kill a Pit Fiend? Good going, there's probably less than a thousand alive now. You kill a Balor? A. You didn't make a dent in the population. B. There's gonna be the Abyss to pay when it explodes.

If only demons could get their act together, all other Fiends and Celestials would be dead.