@Delta
There is nothing in the Overlord verse that comes close to the level of mind hax that Gal has. Your argument is nothing more than hiding behind Ainz's so called "immunity" to mind manip, which is a massive NLF in itself. Negating resistances to mind manip is not comparable to actual stronger mind manip. If I negate your resistances to mind manip, I can control you with simple hypnosis, and hypnosis is in no way comparable to having hundreds of insane dragons crash into your mind. In fact, Downfall could only control a single character in Overlord, while Gal's mind hax can crush multiple armies of people resistant to mind hax at once.
As King said, spells like Thrystra and Jierda are not bone manip, they are telekinesis.
Ainz's energy drain isn't a "drain" so much either. Its more like once he is in your mind, he can force you to give him your energy.
All of Gal's spells have a higher AP than Ainz's defence. They will break through his durability easily.
"Ainz immediately teleports away if Grasp Heart doesn't work" - A) speed is equalised, and B) in the time it takes Ainz to say "Grasp Heart" and "Teleport", Gal says "Jierda" and shatters Ainz to pieces, or doesn't even speak at all and just mind haxes Ainz into being either his loyal slave, or his vegetative skeleton pet.
If I remember correctly, Ainz only has one resurrection item on him. Once it's used, it's gone. And it won't help if he's mind-haxed
Ainz only prepared himself with spells like BoEB when he had a massive amount of prep time before hand. He's being thrown into a one on one fight. You really think Gal is going to give him any opportunity to start casting wards on himself?
And no, the Name of Names controls the language of magic. Any magic that requires language, that has its spell with a name can be negated. This is clearly shown when Gal uses it. Eragon can't cast any spells with the ancient language, even when he tries to cast them non-verbally. It is only when he uses a raw, unfiltered, instrinctual magic completely disconnected from language caused simply by him trying desperately to communicate and make Gal understand, that it worked. None of Ainz's spells are raw instrinctual magic. They are all set spells, with set names. They all get negated.
Eragon has a spatial manipulation cutter. It was a tiny point located behind him, and was warned against because it would cut through anything it passed through. Despite this, using it against Galbatorix never came into his, or the people who taught him the spell, minds, because of Gal's wards
And finally
"Gal has never fought a skeleton before". This isn't even a point.
"Oh no, this person appears to be a skeleton. Whatever will I do. I guess I'll just die" - is that what you think?
No. It would go like:
"Oh look, this person is a skeleton. Does he have a mind? He does! I'll just crush it, dominate it, and make him into my loyal slave.