This scenario is not meant to be tactically involved or remotely difficult.
It is not even meant to be fun, though I always find it slightly amusing.
In fact, you would usually just sit back and watch.
The point of this scenario is simply to put two (or however many) units against each other in a fight and see who is better.
The best way to use it is to simply "edit scenario", select "arena", make the battle what you'd like, and "test".
I selected the "Age of Kings" version because I am fairly certain I didn't use any "new" material, but I could be wrong. If I am, let me know and I will try to fix it.
Please download and read the read-me file for more information. Thank you!