I really see no reason to have a contest tribe, other than "unlimited" totems. Which is a bonus, but whats the point of a totem if it doesnt offer anything extra. You remove the totem bonuses to allow them to place more totems.
The trade system doesnt make sense either for totems. Why not just have a trade option instead of "sieging" it for trade?
This is also missing a TON of details of how sieges will work. Not sure how well 24 hour timers on sieges will work either. Seems a little short. Standard from other games has been 3 days.
Why have it so only the founding leader can do these "trades"? I mean it should just be an option to allow someone to do it or not, else what if the founding leader is inactive the tribe will be stuck like that forever.
If you are trading to GET another tribe, why would that be a big deal to get extra totems?