Maybe a Cool down till they can be eligible to be Emperor again. Kinda like Vamp/Were bite, but instead of 7 days it should be end of campaign, so only once a campaign they can be Emperor.
Sure they can keep the skill tree, but isn't it weaker if they have been dethroned?
That's what campaign end is for, no? From what i understand, the emperor scoreboard gets a clean start when a new campaign begins.
yes but the problem is people hoarding that status for to long and gaining more ap without spending it
Spending or hoarding AP has nothing to do with being egligible for emperor.
Let's say there are only 2 players. Player A gets 1000 AP and then immediately spends it. Player B gets 500 AP and keeps it. The emperor leaderboard would still show the player A on top with 1000 score, and player B second with 500 score. If all keeps get capped, player A becomes emperor.