In spare set #460 the ten leaves come in this order: 2, 1-2, 2-4, 1-2-4, 6, 1-3-6, 3-5-6, 1-5, 2-4-5 and 2-5. One ball for each, and every clear counts.
We rolled each of these leaves 48 times with the Hard computer's aim and errors. On this set it cleared 22.2 out of 48 on average. The kindest leave here is the 1-2 leave, cleared 29 times out of 48; the toughest is the 1-5 leave, with only 10.
Watch for a pin hidden directly behind another (1-5 leave): hit the front pin full so it drives into the one behind. The widest leave, the 1-2-4 leave, has pins far apart across the lane; it needs a pin to slide across and take the other. Clusters of three or four pins (1-2-4 leave, 1-3-6 leave, 3-5-6 leave and 2-4-5 leave) fall to a ball aimed at the pin closest to you.
A friendly set: straight balls from the opposite side will clear most of it.