I haven't played Tactics but in AC it sure as hell aint the omnislash.

I'd say the FF7 Omnislash because its more appealing. I felt awkward when I saw the AC Omnislash because of the floating swords, not to mention floating Sephiroth.

Does the Omnislash have 6-7 swords in it? In this case..we are both wrong..with me getting the actual move mixed up with something else I've seen

I prefer the original Omnislash, though AC's is pretty bad ass as well. Maybe that's just because the original Omnislash is just more classic than AC's :\

It did look devastating, but...the truth is, if that technique had been used against pretty much anyone else, it wouldn't have been effective at all. You basically just have to move out of the circle of floating swords in order to render it completely useless. If Sephiroth had floated up or down even the slightest bit, Cloud would've been flying around like a moron until the end of the technique, at which point Sephiroth would either impale him or continue messing around like the arrogant idiot he was. I'm not saying the technique didn't look cool, because it most certainly did look incredible, but it really isn't that devastating if you devote a neuron of brain power into avoiding it.