5a 5b 2c 5c j.B (hold) j.C A-drill 2c (hold), release B, 2a 2b, release C, wait for them to fall a little, 2b B/C flash kick is the closest to a universal bnb you will find, but it doesn't work at every range (covers quite a bit though). You can also opt to release the second bomb and just let them fall and go for instant overhead instead of flashkick. I'm not the best at execution either but can already do that combo pretty consistently so it's nothing time spent in training mode won't solve. Just practice, this character is worth it IMO.
Also remember that if for some reason you mess up the first hold you can always just 2c OTG into flashkick for a knockdown.