Can they change or make an option to upgrade bombs to only go off when a minimum of 10 troops are in blast range. I mean troops that use 1 space, a troop that is rated 10 places or higher would trip the bomb with 1 troop only. The problem is you spend all this gold on a big bomb only to have 1 goblin set it off. After it is triggered the hordes come in. Making it a waste of gold to buy because it is ineffective.

