You should be alright by level to take him down. Move your characters to the back row. Take out all attack magic materia (fire, ice, lightning ect), they are useless with the exception of some of the more powerful summons (such as bahamut). Give your self some magical bumps in the now open slots. If you have the long range materia use it on Cloud.
Use Barret and Cloud to focus on limits and physical damage. Use the womans healing capabilities as often as they are needed.
Also individual questions like this one should be made in the applicable thread. Meaning this one labeled "important" http://thefinalfantasy.net/forums/fi...thread-10.html
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