Flare why don’t make something like a mini game in royal revolt 2. Something that will make players come online to do when war is till 5 days and when all workers are working for 6 days.
Some players have all workers working and war is in 5 days and they don’t come to play until the upgrades are finish but some are busy some get inactive.
maybe you could make like a game like the dungeon where you have to run and dig for gold and gems or the gold and gems could be hiding and your king have to fight ogre’s , mummy and werewolf to win and save some knights or paladin to bring them back to their kingdom.
Or make it some like a story.