It sounds like a good idea, but I couldn't help you with it, honestly. If you do manage to get this idea up and running, please PM me as that would be great.
Also, a few ideas:
- Ability to choose a minor god to worship to gain certain special powers (as long as you give offerings regularly)
- Ability to kill a minor god for permanent benefits (e.g. killing Cthulu would give Water Breathing permanently or something)
- Automated cannon towers that will destroy intruders
- Ability to make altars to give offerings in
- Basic idea of making a giant castle and fighting people off
- Ability to hire NPC Archers/Soldiers that will fight for you in exchange for food
- Alliances between players (no claimed land, but it IS marked, so not factions)
- Attempting to mark someone else's land as yours automatically declares wars on them
- Declaring wars on other people/alliances for any reason
- Automatic peace between worshippers of the same god
- No lag
- Airship battles
- Massive wars
- Priests getting to declare wars on entire other gods (which is how you get god kill buffs)
- Winning god wars by killing opposite's god (which is an NPC)
- Winning player wars by destroying a the center of the enemy's base
Sorry if that is a lot of ideas and if I am completely misinterpreting your idea, but those are the things I think would be cool.