Con mod of +5 isn't that hard, since you can start with it, but I probably need to change it to Con score -10. Which would be more in line with where it should be. And you're right about grafts with Con penalties. I need to rebalance all the penalties anyway. Too many of them are just dull.
Learning Experience is supposed to Extraordinary only, if that makes any difference. I realize I missed the important word out.
Well, it's something of a technicality, but he does have a caster level equal to class level via Necromantic Magic. I'll make it more explicit though.
Unholy Vitality is level 19, it's supposed to be crazy.
And I'm glad I broke the Nan brain!