Map: mg_commandconquer_v2 (link: https://gamebanana.com/maps/154704 ) IMO one of the most open and fun sandbox MG maps, and concidering the fact that this server has a sizable playerbase, it should be suitable in size as well.
No need to make another thread buddy, just reply here: https://hellclan.co.uk/threads/80/ - by saying why it's a good map, etc... And a clan member will take a look at it.