New Dark Troop?

I know we have just recently had a new troop the bowler but this could be used for the future. How about making a troop which actually builds defences that shoot enemy buildings. It could be something like a king builder the king of builders. He costs around 200-300 de and has 15 housing space. He has a movement speed of 10 in normal state and goes towards walls. A relatively decent dps 75 or so. Whenever a cannon, mortar or air defence is destroyed, the builder will run towards it at a speed of 24 jumping over any walls to re build it and shoot for your side but 3 levels lower. His hp should be similar to a wizard's. However, it will take the builder 6 seconds to re build the defence. When upgraded the building time will be reduced.