andur
[10] Knight
Snip
Also keep in mind that since GI costs meter to get this "guaranteed" damage (its not totally guaranteed as it can still be re-GI'ed by your opponent), you aren't using that meter to extend your combos with BE or CE moves which is true guaranteed damage.
Oh and some auto-gi's are already free guaranteed damage on GI anyways, and those don't cost any meter to do.