1. He means the 1.2 fixes found here: https://forums.totalwar.org/vb/showt...before-posting
But you probably already have those.
2. I'd say the most recent version you can find.
3. EB with trivial script is normal opening.
I do have a question about this for someone: Is it the SP exe or MP exe?
4. You'll be able to find someone already there, but it might be easier to find someone before going online. That way you know they'll be active and ready.