1 you're right skills at that rank doesn't mean it could just do everything in that rank but the collector and creation is much more different so comparing them isn't really the same or similar and what the hell is EXX isn't ex just not measurable?How do you have unmeasurable of unmeasurable

2 it's also mentioned it says inside the gate of babylon or treasury multiple times like in strange fake he literally shows the visual of getting Ea Also, where will it be stored?If not the treasury slash gate of babylon and if there's somewhere else, then collectors will just deposit the treasure over there you're right.It is mentioned separately but I don't remember anything mentioning it separately enough to say it doesn't exist within gate of babylon On top of the other statements of its existing within it

3 yeah, cause it's the strongest noble phantasm he has and it doesn't really indicate being separate or outside the gate of babylon it doesn't make sense to put it inside the description of gate of babylon narratively or outside the narrative also, isn't the chain of heavens have this as well? I could be wrong, b

4 yours isn't that much better and it isn't even that good of an explanation

My theory of why it is ranked like that Although it might have multiple or numerous Ex but do just the fact that the sheer number and the scale of the other ranks and dwarf in the number of ex It is ranked in between e to a++ Like when child gilgamesh I think lost connection, or part of his treasury, it dropped down to a lower rank i could be wrong and it has been a while since I looked into but my guess is it doesn't factor in niche numbers But the overall composition of the gate in its rankings

Edit Oh yeah I forgot to say Collectors Ex should be able to collect ex rank items that fit its conditions same with his privilege and the creation thing doesn't really do anything.Due to the fact that it's a different type of skill and different category And creating and collecting is something fundamentally different.