yea i found that out the hard way lol but hes still pretty good against him. Thundaga? When will you have the chance to use that with the constant sf stoping his slow movement?
You would have to be out of range to do it because thundaga is not fast if this is a continuous non-stop sf spammer. But I think its reach is better than sf so if you dash away far enough it might work
You wouldn't try to outspam Sephiroth anyways. It's better to try to stay close and pressure him. It's still hard as fuck with all the spam