@ mathia You dont need another putter you just need to work on your short game . Here`s your problem :
G.I.R. 69.87%
AVG.to Pin 19 ft. This is what you need to work on . Shot placement on your approach shots . Punch Pitch and Flop shots are what you need to work on . This is where you improve your game .
Learning how to use your wedges and short irons will get you closer to the hole for easier putts . Once you learn those shots you will be able to get at least down to 11 ft as your average distance to the pin . You work on that and the putter you have will do you just fine . Then if you want a better putter do the upgrade but work on your short game first .
Even though the L98+ Sabertooth is a great putter you will still need to have a good short game . So work on that first and save up your credits until you can get closer to the pin first .Hope this helps and good luck with your game .