Raising the enemy's guard is always better. Since your opponent most likely will know many of the basics and advances that you know, making them expect something is much better than making them relaxed, that way you know exactly what they're gonna do.

A quick slash down carried (they raise their sword parallel to the ground, and you know they gonna block it that way) followed by a sudden moving up their safe side (handle facing, which most likely means their right or your left) and slashing at their belly with your sword close to your body and letting your own movement and the length of the sword cut.