I've tried charging for a long time at first, but spamming is m=just way more efficient, since there isn't a minimum cooldown between shots, you fire as fast as you can press space, so there's practically no limit in dps. I have a mechanical keyboard, so I just pressed the spacebar down almost to the point of activtion and just started vibrating my hand at ~5-10Hz lol
It's probably a good Idea to add at least 0.2-0.25 seconds of cooldown to prevent cheesing
Also, a lot of the times you can dodge everything by just warping through the edge