I somehow managed to get all of the hits to connect on a long juggle w/ him and got a huge percentage. I really, really think it was 50%, but it was 4 in the morning, so it may have been less. If you don't get all of the hits to connect you can usually get between 35 and 40. But if you time it just right, about a second before they hit the ground, they'll all hit.
It was the same one that you could do with Lao in DA.
U+4, U+4, 1,1,1, CS, 4, 4, CS I think.
And has anyone else noticed that they've taken out the use of walls for juggles. Man that sucks. After too many hits near the wall the combo just stops.