You get a 1 dot gain in distance and feel (slightly slower meter speed) with the 44 credits - 3 Pack of WGT GI-D Balls.
Unlike Starter balls, these balls wear out after about 120 hits, so you would be getting about 3.6, 18 hole rounds per sleeve of 3 balls (about 12.5 credits per round).
Drive for Show. Putt for dough.
Par is established on the assumption 2 putts are used per hole. You are averaging 2.44 putts per hole. So the first goal should be to get that down to 2 putts per hole or less. At 2.0 putts per hole average, you would cut about 8 strokes off your average score. (.44 x 18 holes = 7.92)
On a par 72 course, half of par is putts - 2 putts x 18 holes = 36 strokes.
Consider getting the 400 credit Spider Putter when you reach level 19.
So you might want to consider a putter upgrade. However as mentioned, if you upgrade your wedges you could likely hit approach shots closer to the flag stick as a way to make more putts, and also reduce your scoring average.
Look at and compare the level 14 Taylor made ATV 54° and 60° wedges with the starter wedges you currently have.