I haven't seen all of their matches, but from what I've seen, 4488 has some serious skillz.
https://www.youtube.com/watch?v=yWduHPHCZjk
2 stacks of 6 with cans and litter. 42 + 42 = 84 points.
EDIT: Looks like they have even more skillz than I thought, see Thad House's comment below. 94 points!