Test battles?

[Ironhawk]

For something quick and dirty, yeah you can use Shift-U. Otherwise, they just set up a game with the same settings as they want to test. Often with the Debug mod so its not neccessary to research or stockpile significant gems. Setting it up with 2 human players is best so you can completely control whats going on. Save off the game directory just before you do the turn and you can test the same battle over and over.