Might work with a few tweeks.. ie.. no more then 3 Raids on any Nation in the same say 4 hour time frame total... It is still a game and expecting people to be able to defend a6 or 7 raids and a PB at the same time is just asking for people to quit.
Raid should be able to get a % of whatever is in any Production Buildings and storage at the time(resources)...and a % of city income... The City owners keep the city but cant do anything with it for 48 real hours and then no one can raid it again for 7-10 real life days AFTER they get full control back..
I would love raids to be a thing but I just not sure we will ever get them... Kind of like manned Forts... We know the Towers can be manned we did it all the time in the old days when we boarded them.. I think it would be awesome to have each one player controlled This would allow for some interesting Attack and Defense adjustments.. Maybe have the Forts BR reduce teh total Fleet defense BR? or for each fort the attacker get s bit more... based on Fort and Twer BRs?