Better not to think-dwell on these skaven. Even better-yet, certainly don't think-plan ways to defeat them.
I'd argue-debate point number 2 & 3. torn from the page of the latest skaven faq, it states "Q: Does anything special happen to a Screaming Bell...
Impossible to beat. Better to just run-run quick-fast from Skaven.
Skaven players are rarely treacherous. Not like us lizard-things.
Sounds like he really knows what he's doing. What a great general-leader.