Everyone is different, but I'm always reminded there is never enough time to practice all the shots you need to play your best golf. By that i mean the trouble shots - not full swing shots. So, it occurs to me that you should work hard on your full swing, but you will get better scores quicker if you work harder on the trouble and short game shots.
Putting, in my opinion, is more less creating a procedure that allows you to consistently make the putter travel down your intended line, strike the ball solidly with a square face such that the ball starts on the intended line. From there, making 5 foot putts is fairly easy. If you made 95% of all putts inside of 5 feet, what would happen to your score?
So, putting practice is fine, but just rolling a few 20 foot putts to get the speed and then making 10, 5 foot putts to confirm your stroke is about all you need. Therefore, I'd suggest spending more time practicing chipping, pitching and sand shots. Combine that practice with the ability to make a lot of 5 foot putts and your might save 5 or more shots per round.