Having all your clones bomb the same exact spot is a waste of effort though. I 5-box this by using a star formation bombing pattern, other then an out of the way Pit Overlord, or a really underpopulated bombing run I only have to spam the button to complete it, don't even have to bother using my main.

Minimap Ping: -10, 0
Minimap Ping: 10, 0
Minimap Ping: 0, -10
Minimap Ping: 0, 10
Main: 0,0

Your minimap zoom state will determine where the bombs land, I have all my alts fully zoomed out.