...one thing does occur to me, and while it's too late now it may influence the match if it comes up again:
couldn't Heat just regen one tentacle and then Makanda Sephiroth? After one/two of those, Deen's not going to break the tentacles in one hit under most any interp, which gives Sephiroth fits. I'm not seeing anything in either skillset that forbids this, but I could be wrong here. (Yeah, Sephiroth can just kill the one tentacle easily. And then Heat raises both back up.)
I admit to being really bloody fuzzy on Sephiroth, but I'd think this would work? Maybe?
Side note, for the Tonfas/other people: what's Sephiroth's HP score?