Fantastic job on the conversion. In my spare time, I've always tried making TNO as a gish to simulate his fighter-mage-rogue classes, but I never knew about his cleric levels.

And I have considered making him an epic-level NPC that my players will encounter in Baator, specifically a warlord who manages to rout entire armies with his small band of elite mercenaries, while wearing no armor and wielding only that spiked mace of his.

One question tho: Why can't TNO achieve epic Wizard levels post-merging with TTO? Even if TNO doesn't have the necessary knowledge, TTO has been around for just as long in a single incarnation as well as his trademark "I can unmake PLANES with my POWAH!" seem to suggest the possibility.