Seriously, tifa in a party? Other than gaining her limit breaks, hell, I'd choose her. It's always worth it to get everyone's limit breaks. Cloud, Cid, Red 13, Barret, Yuffie and Cait Sith would be my 2 parties against Sephy, before I even heard of Vincent, I used Tifa. (Well, I HAD too.) My main party's normally Vincent and Aeris/Cid. Who wouldn't use Cid? Someone who hates cursing, smoking and very few Materia slots. Highwind, Grat Gospol, and (wait for it...) OMNISLASH!!!