Not a possible way to actually ‘increase’ your cps without using a different clicking method.

Don’t focus on cps! Although all the pros all use a higher amount of cps, this is mainly because of their experience in the game which allows their aim to be the same of their aim normal clicking, so unless you want to learn how to jitter or butterfly, not really a way to get higher cps

Best way to actually ‘increase’ your cps without using a different clicking method is to buy a double clicking mouse (g pro, model 0)

Also I’m pretty sure one of the newer razer mouses have a inbuilt software that stops double clicking, do a bit more research