First you are going to need to shoot 56 to qualify for the tournament, 57 won't make it.
Siggipj76 is right on here. I play with really good equipment but I do vary my golf balls from high quality WGT for just goofing off to the high level Nike balls for tournaments or the qualifying. Why do I do that, because it is a huge advantage and I need that to be able to play with the better players.
In alt shot or stroke play for fun, it's not that important to be playing with 700 credit balls but as was stated above, you can't play these really good courses on championship green speed without them and expect to compete. Hole #1 at the Qualifying is a good example, you hit your approach from roughly 155 yards depending upon the wind of course. If you go 5 feet past the hole, the ball will catch the slop and roll out another 25 feet. You have to know that you can land the ball near the pin and stop it, if not you come up way short or way long. Good balls give you that ability when paired with good irons and a good player.
I'm of the opinion that WGT has overdone the quality of balls and clubs. The courses just can't keep up. However if the clubs and balls were not as good, the same players would be on top of the leaderboard, the scores would just be higher. The same guy would win the tournament, but instead of shooting 40 under, he might shoot 20 under.
In that view, par means nothing and I guess that in reality it never did on here.