watersprouts
That is a gazillion watersprouts!!!
1) First, cut all the biggest (not necessarily the tallest), rather the thickest at the base, of the watersprouts. Walk around the tree as you do this to keep the pruning balanced.
2) Then look for twigs that are crossed, or that have the potential to rub together in the wind. Cut one or both of those. Walk around the tree as you do this to keep the pruning balanced.
Step back and look at the tree all the way around. Repeat #1 and #2 until you've cut an approximate total of 25% of the sprouts.
Repeat next year.
FYI, I have heard that doing this sort of pruning in July lessens the regrowth of watersprouts and encourages fruit spurs. I know this runs counter to folklore, but so far, in my experience, it works. Less watersprouts mean less time spent pruning.
Good luck.