That's an old H~I trick with the links
limit number of territories a gang can hold. ( say 15-25) so even the best gang can only have the best cities, leaving a bunch for other gangs or secondary main gangs. wich can also add fun.(dc-dc2) -- Agreed. New players coming to the game seeing territories being dominated by one gang just won't see the fun in it.
Make it so each gang can only be declared on, one at a time,
no double gang declare. And have a 24-48 hour cool down, between every war.
Where both gangs get time to kick/ regroup/ train. - Agreed with this one too.
Perhaps another idea that might be a bit 'out there'. Perhaps scrap the EXP scoring system altogether since defence based players got shafted before and go with the number of crimes, hits and mugs (50/50 about mugs since this can be rigged by sending cash and mugging back).