Shock/Health: Hardcoded animation?

And you can't set enemies to counter the Shock command exclusively. 

why not? might have missed a line or two of the discussion, still if you wanna make a custom counter for shock and a different one for any other magic then all what you need is to put as first counter a reaction to shock command or megahit spell; as second counter(below this one)
you make a counter to magic command.
Sure, if it's a matter of common sense, then it's another story...