So, I tried to play Gridshot with 400 bpm metronome playing in the background. It helps me improve my clicks per sec. I don't know if this will improve yours but I
400 BPM - Metronome - YouTube
400 BPM Blues #400bpm #walkingbass #fast #jazz #blues | Instagram
Exciting Android updates for the Metronome App by Soundbrenner - Soundbrenner