Hmmm... alternative idea: We create a monster explicitly intended to be a reusable expendable beatstick. Some kind of spirit creature that possesses objects and can escape after the shell is destroyed, or a minion-spawner that can be parked somewhere secluded and used to produce expendable drones, or something with the power to make a copy of itself, or something like that. Investing a lot of its power in whatever makes it reusable means it would probably be rather weak comparatively, but we don't need a particularly strong monster for a lot of those purposes.
Then we could use it to shake the nests, do distraction attacks, or just provide replenishable cannon fodder alongside more important things.