j. B, std C, f + B,

The reason why it does 95% is because of the extra hit when he falls down. Normally, if done outside the corner and/or done at the "wrong" distance from the corner, the extra hit misses. However, the prior hits before the LDM puts Shingo in the perfect position to get that extra hit (similar to how you gotta properly "position" Oswald to get his ghey Ace to connect).
Problem is, Shingo has a harder time cornerfucking the opponent than Kyo does. You will probably need 2 skill stocks to do this, as your other two characters are probably gonna be the ones pushing the opponent into the corner and therefore setting the switch out for Shingo's LDM combo.
Kyo is an excellent setup for Shingo, fittingly enough.