It's further proof against Mesaana though. Her PoV in LoC showed that she needed to force herself to be cruel, and that she struggled with the concept. In other words she struggles to be evil like the other Forsaken, and this is pretty much why she's considered to be second rate.

In my opinion, Asmodean would be scared of Semirhage, Sammael, Lanfear, Demandred and Graendal. I don't think he'd be scared out of his wits by Mesaana or Moghedien. Not only that, but those certainly wouldn't go after a male Forsaken - they're far too subservient and cowardly.

Only Lanfear knows that Asmodean is shielded. One would think that he wouldn't be scared of her, and that she'd merely come to check up on him - but he'd seen her in a fury at the docks and knew she'd be after blood. That means only a very daring Forsaken would go directly for a male Forsaken at 'full' strength, which once again reinforces my list above.