Several servers I have previously played on have a plugin that permits players to stack mob spawners in a single spawner (Only works with the same spawner type) and upgrade the spawners with experience points (Vanilla levels). I feel as if this would be a benefit to the community as spawners don't have to take up so much space in a base and there is more room for other spawners. As well as this, raiders can raid spawner rooms with multiple spawners than what is visually visible (visible with World Download). In addition, players don't have to spend money on more spawners as they can upgrade the spawner with experience. The spawner upgrade can be disregarded if it is deemed unnecessary.
