Best corner combo so far for him.
2 power bar - 50% drive bar - 55%
j.D, s.C (1hit) -> df+A -> qcb+AC, b~f+A, b~f+A -> (DC) qcf+C, qcb+AC, qcf+C, b~f+A, b~f+A
The last 2 b~f+A misses sometimes so it's good to replace it with b~f+C or qcfx2+AC instead of 2 b~f+A
You can also do another set if you have more power/drive bar and it'll end up doing 70%ish.
Note that his combo actually charges up about 1.5 power stock, so you'll actually be in deficit of half a power stock and less than 50% drive bar after completing the combo.
You can also opt to not do the 2nd qcb+AC and just finish with b~f+P for less damage (40-50% range) if you only have 1 power bar but you should end up charging one whole bar - ending with little change in power stock from where you began the combo.