Something like goggles that display the AOE of each torch as an MVP, plus the ability to see where the torches are at through the walls.
Makes hard to remove torches when we need mobs to spawn after tens of them were placed all over the base.
Would be also nice to use the tool to tinker every torch, like changing it's AOE from the max to something smaller for fine-tuning in case we need to allow natural spawn in certain places.