Ok i did some reasearch from one of the masters on this subject, we all know who he is

, so lets see if i can help kuja kick some vampiric ass!
According to my source, all magical damage deat to kuja is cut in half. Give or take a little bit. All of raziel's glyphs require magic to produce, so all of his glyphs will be doing half damage at best.
As stated before, Kuja has the ultima ability, which we all know can cause massive destruction. And as stated previously, Raziel can only shift into the spectral plane at special shift points. This leads to one of two possibilities. One that could mean an instant win for kuja, bear with me as i explain.
The rules state that once raziel is forced into the spectral realm, the match is over. Now what happens in this scenario. Kuja and raziel are duking it out. Kuja Goes into trance. Its a fierce and close battle. Kuja casts ultima. Seing how it is a fast projectile of seething energy, it hits raziel square in teh chest, he is taking a beating and needs time to recoup, so he looks and finds a spectral shift point. He makes it in. Here is where the brilliance of kuja comes in. He casts some powerful spell (dont know any of the names sorry) and brings the whole cathedral down around them. The spectral shift points are burried deep within rubble. Raziel cant get out from teh spectral realm, so in a sence he is forced to stay there, game over kuja wins.
Another option would be is for kuja to use his emmence power and just bring down the whole arena to destuction. This would affectivly bury the spectral shift points, raziel would have no way of going in them. Puting raziel at a disadvantage.
KUja could also just levitate in trance, spewing all sorts of shit at raziel. Sure raz wont get tired, but one of these projectiles is bound to hit him.
Raziels soul might finally be put to rest...