Yasuo 2XKO combo: 552 damage, hard, by Evan Almighty. The kara cancels at the beginning are auto timed but you'll have to delay the later stance M perfect…
6[S1] > 2S1 > 6 > M > 2S1 > 6 > M > j.S2 > 6[S1] > 2S1 > dl.M > j.2H > j.S2 > 2S1 > 2H > 2S1 > 6 > dl.S2 > 2S1 > M > j.2H > j.S1 > j.S1 > j.S1
The kara cancels at the beginning are auto timed but you'll have to delay the later stance M perfectly to get the j.S2 double bounce