Eh, he might be able to survive the basilisk stare actually. I still don't really know what exactly orochimaru is, but it seems like he may well survive the destruction of his body. IMO though, it will come down to shadow clones, assuming the 4th isn't retarded he will probably use one to probe the enemy, and then get insta-knowledge of the death-stare when his clone poofs out of existence. From there it's just a matter of overwhelming the basilisk with clones, and I don't think beowulf would be able to keep up with them at all in combat speed. Also, can orochimaru use shadow clones? I can't remember him doing it, but he did have the schtick about learning every jutsu.