Solution: Aim
-Dont go firin' willy-nilly when or if you get the mininuke. Fire a test shot at no bricks or players to tell how much it will arc, then aim and fire at them noobs.
-Second, I get what you mean by the blue dot blast radius, but It would be almost completely impossible to create for the client side, It would fire invisible projectiles at a high speed that would travel for instance 10xSPEED at 10xGRAVITY FACTOR. The "Explosion" would be that blue dot/circle in the form of a flat, 2D image. However, if you hit the floor near a building, it could not cover the building as well. Likewise It applies to all angled Surfaces