While standard single-finger clicking caps out at around 6.5 to 8.5 CPS for most users, professional gamers and speed clickers use specialized biomechanical techniques:
Standard index finger tapping with relaxed hand posture. Safe and reliable for all games.
Vibrating your forearm muscles to create high-frequency finger spasms on the mouse button.
Alternating index and middle fingers in rapid succession on a mouse with low debounce delay.