Strike n Smash
Phys. Attack Power: 13-18 (150%)
Soul Cut Blade
Phys. Attack Power: 31-37 (120%)
By the numbers, it would seem Soul Cut Blade should do more damage. I've tested the two skills extensively and Strike n Smash does more damage.
Does anyone know why that's the cause? Test it out for yourselves.. you'll see what I mean. Also, what does the 150% and 120% mean? It can't be cooldown time because Illusion Chain (67%) takes longer to cool down than Soul Cut (120%), but Soul Cut is also faster than Strike n Smash (150%).