Just a short note: Which sane fighter has con as his lowest ability score? (Besides the one intending to become a vampire ;) )
Further more the stats are way more than average. That bumps the CR up by a bit as well ...
I'd say, tough fight.
Spellcraft: [DC 25 + spell level] After rolling a saving throw against a spell targeted on you, determine what that spell was. No action required. No retry.
The discussion in that thread refers to the next sentence: Effect and area spells are not affected.
All the ray spells have the Effect: Ray descriptor, and thus are not affected by spell turning.