Would be amazing to have a toggle for this behavior. I really like the minions staying behind to add danger, and thematically they don't always have to be connected to the "life force" of the summoner. For example, if the Avaton brings plagues of insects upon civilization, it would be a very ineffective plague bringer if its death meant all of the wetas died instantly - the threat should remain afterwards imo. But having a config allows this decision to be made by the player or modpack creator.