Tips on scenario making

[TomBombadil711]

I am currently experimenting with the scenario editor and working on my first ever scenario.

Some questions:

What does the retreat direction 0 (default) mean and what effect will changes here have?

How do you decide about a units experience, especially when the sources about a battle are rather vague?

What makes a good/balanced scenario even if the historic battle was not balanced?

How many sub-leaders/allied leaders would you place?

Are there any information/links available on scenario design in RoR?

Thanks in advance!

Tom