The first templates that come to mind are:
1. Fall of Jerusalem:
http://warlight.net/MultiPlayer?TemplateID=4398962. Westeros:
http://warlight.net/MultiPlayer?TemplateID=4368213: Continental Warfare:
http://warlight.net/MultiPlayer?TemplateID=4713964: Modified LEA Season II settings:
http://warlight.net/MultiPlayer?TemplateID=465434I recommend them roughly in that order.
#1 and #2 have been tested several times in 5v5 matches, and I can promise an interesting game! 3 and 4 are both 'theoretically sound' templates, meaning, I have limited experiences with them, but they should be viable for 5v5 matches. We can alter settings as needed, if you guys aren't too happy with it.