Wow, this become more of a mess than I thought.
First, servants resist concept manip with Magic Resistance Rank B and higher, this is accepted in the servant physiology page. The concept manip also is accepted as
type 1, in the moment of the crt type 2 wasn't merged with type 1 but currently the change is already done so it's accepted as type 1.
Second, True Magic it's different from magecraft, yes, however, it is noted many times that True Magic wasn't something impressive in the Age of Gods, it's say that it was something much more common than the current era, that's the reason of why the mages, and beings in general, from the Age of Gods have disdain to current magecraft. Magic Resistance Rank A resist even the things from Medea who was famous as witch even in the Age of Gods (and who also had concept manip and darkness manip). Also, Rank D resist time manip as said in the servant physiology page, the Second Magic is just a form of time manip much more powerful Zelrecht quite literally is tier 1 and the Second Magic let him see the paralel worlds as pages in a book.
Third, Magic Resistance resist paranormal in general instead of just magic, this is showed by how they resist the powers of Mystic Eyes even though they are genetic mutations, the scan of time manip resistance even come from resist Mystic Eyes that freeze time.
About names I feel like there was someone with a power specifically related with names in fate but I can remember it, but what I can remember is that there exist a concept manip tier 1-A with words, the Unified Language, which obviously is much above what Ichibe can do so they are incomparable.
So with Magic Resistance Rank A the haxs of Ichibe don't affect him, so his win con is trying to kill Gil with a physical attack with his higher AP. Gil passevely know how powerful it's Ichibe and the difference in their AP, so he can either use instantly Enuma Elish (which is space-time hax even when not at full power, that's the reason of why it's specially effective against Reality Marbles), or he use treasures from GoB with precaution (in other words, use durability negation weapons with space hax, curse hax, poison hax or whatever make the durability difference useless). They are 500 meters apart so I can see more times than not Gil landing a weapon with durability negation or charging and firing Enuma Elish, so I vote Gil.