So, which attack command is better?
Slash-All has got this fantastic Flash command, the one that simply kills all enemies; but 4x-Cut attacks four times in a row, and can be a huge killer against a single target, causing up to 9999 x 4 DMG every single turn.
Which one is better?
I usually prefer 4x-Cut, since it always works on everything, but Slash-All and Flash can indeed be very useful as well.