sephiroth stomps, no competition.
@Dartz: Well regardless, the only time I recall him having the barrier up was during FF7 when he was changing into Safer Sephiroth and fusing with the Lifestream. You haven't seen him milked any use of barriers since, even during his frequent spars with Cloud, have you?
I don't think it was stated or implied he was Safer Sephiroth when he placed that barrier.
Sephiroth had set up the barrier around the crater in FF7 to protect himself while he transformed into a form he seen as benefiting a god (i.e.: Safer Sephiroth).
The fact that he didn't replace the shield after it was overwhelmed leads me to believe that it requires prep, which he doesn't have.