"For me, it's kill rates at 0,35 for offense and 0,85 for defense. It favors defense over offense so much in a beautiful way. You only need minimal troops to hold a territory (ex. 10 units kill 4) meaning you can expand at a moderate rate at the same time." +1 Zero, I really enjoyed that template every time I've played it.
Although.. my favorite non-standard setting is army cap, and my favorite template is:
https://www.warlight.net/MultiPlayer?GameID=10521340