How to quickly enrage a wave many times

In Gemcraft there's a huge advantage to enrage waves with the cheapest possible gem. But this requires a lot of work because you'll need to do it many times.

There's softare to combine gems and maybe this could also be used to enrage waves.

But I only want to enrage the waves, is there a way to do that quickly without extra software?

Like you can fill up your entire inventory space with a gem level in one click. I'm looking for a combination that bombs the entire gem inventory into one target (wave).

Edit: I've seen one Youtuber do this in a video, it includes the mouse wheel to set a stack on the gem bomb spell, but I've been unable to reproduce this myself.