Basic Juggles: (this is adding 1 hit and about 7% for air throws in damage protected combos and 14% for regular combos since the game does not count them as part of a combo)
1. HK, D+LP, D+HP, aaHP, spear, HK, D+LP, D+HP, JK, air throw, 10 hits 48%
2. HK, LP, JK, teleport punch, spear, HK, D+LP, D+HP, JK, air throw 10 hits 53%
3. jump punch starter, HK, LP, teleport punch, harpoon, HK, D+LP, D+HP, JK, air throw 10 hits 55%
Advanced Juggles: (Harpoon makes corner combos easier to set up)
1. jump punch start, HK, LP, deep JK, harpoon, HK, D+LP, D+HP, aaHP, JK, air throw 11 hits 62%
2. (on male ninjas, Stryker, Sub, Jax, Kano etc) HK, LP, RH, teleport punch, harpoon, HK, D+LP, D+HP, aaHP, JK, air throw 11 hits 57%
3. aaRH, teleport punch, aaHP, aaHP, harpoon, HK, D+LP, D+HP, aaHP, JK, air throw 11 hits 62%
4. aa(HP,HP), teleport punch miss, aa(HP,HP), spear, HK, D+LP, D+HP, JK, air throw 11 hits 68%
5. jump punch starter, HK, D+LP, D+HP, spear, Run close to corner if already near, HK, D+LP, D+HP, JK, JK, air throw, 11 hits 65%
6. aaHP,HP, JK, teleport punch, harpoon, HK, D+LP, D+HP, aaHP, JK, air throw 11 hits 68%
7. aaHP, HP, teleport punch whiff, aaHP, JK, harpoon, HK, D+LP, D+HP, aaHP, JK, air throw 11 hits 78% (BP)
Corner punishers:
1. (very close to wall) aaHP,HP, harpoon, HK, D+LP, D+HP, JK, RH, HK 9 hits 60%
2. (very close to wall) aaHP, RH, harpoon, HK, D+LP, D+HP, JK, RH, HK 9 hits 71%
3. (very close to wall) aaRH, harpoon, HK, LP, harpoon, HK, D+LP, D+HP, JK, RH, HK 11 hits 72%
4. (half screen distance from wall) aaHP,HP, JK, aaHP, harpoon, HK, D+LP, D+HP, JK, RH, JK 11 hits 83%
5. (sweep distance from wall) aaHP,HP, JK, RH, harpoon, HK, D+LP, D+HP, JK, RH, HK 11 hits 93%
You can add two HPs before the final JK, air throw to the Robot Ninjas, Jax, and Sub-zero, but it is very difficult to time, and two LPs on male ninjas, adding only 1% to the finished combo.
(taken from the Bibe:
http://ultimatemk.com/cguide.php?character=hsmoke&game=umk3arcade)