I've been hanging on this story for a while, are you planning to continue it or have you already abandoned it?

will Tanya and aniz become friends

That map thing might be because no one outside the middle east or it's naibering lands care what it looks like. I live in the U.S. and I can only name a few places by shape, the old user, china, Japan, Mexico, Brazil, U.k. Australia, Canada. Maybe one or two others. So most not noticing the map is not surprising.

interesante-interesting

Tanya is probably around level 100 when she's using the Type 95 in terms of raw power. Like the others have said, Isekai Quartet is pretty much the only thing we can base upon.

And lol at the Overlord Fanboys saying Tanya can get one-shotted by Ainz.

I mean i estimate Tanya's level at 67 or 75 at the highest, her magic only reaching 8th tier at the highest, shes definitely not stronger than a lv100 player due to super-tier spells, and various other immunities a lv100 player would have, and that's not including the reality shattering world items.
Tanya could put up a good fight but its damn near useless against the full might of Nazarick.

While it is massive, Tanya's mana supply is not actually limitless. I don't know about the light novels, but in the manga, it was mentioned that the type 95 stored some of her mana so she could use it later. She didn't mention if it was an intentional act or a sideeffect, and she didn't mention if it was only while she was using it or if simply having it on her was enough.

In terms of raw power, there is something to keep in mind. The anime version, which is probably the version that most people are familiar with, has a lower power level than the manga, and probably the light novel since the manga is the more accurate adaptation. For reference, remember the magic lasers Mary Sue was using in the movie? Every mage in the 203rd can use those in the manga. Using their guns as staffs is simply something that expert mages can do. They still have enchanted bullets, since their mana can still run out, but yeah, every member of the 203rd in the manga has the ability to use magic lasers. Incidentally, Tanya can actually fire them from her fingertips, something that it's mentioned only a few mages are capable of. She still generally uses her gun, the reason is never stated, but it's probably more efficient, but she is legitamately one of the best mages around even before you take her massive mana supply into account.

As for raw power, in the manga, Tanya has, while using the type 95, punched through multiple buildings in a naval fortress with a single spell. Specifically, it was an optical spell, not an explosive one, so I suppose that it was more concentrated.

I think any spell from Tanya universe would hurt a player as magic immunity comes from player passives that block only teir related magic from the game. As wild magic doesn’t matter which tier it might be. It still hurts them as it does not exist in the game so does not follow game logic. So hurts them

It is shown that Ainz puts Tanya mere rage at the range of 8th tier spells.

Potential Plot Point: Tanya and Ainz have a conversation where Ainz realizes that Tanya is his greatx grand uncle.

Potential Plot Point:
Tanya and Ainz have a conversation and Ainz realizes that Tanya is his greatx grand cousin.

make tanya and ainz knew each other because isekai quartet

Potential Plot Point:
Tanya and Ainz have a conversation where Ainz realizes that Tanya is his greatx grand uncle.

Potential Plot Point:
Tanya and Ainz have a conversation where they realize Tanya is Ainz's greatx grand uncle.

The Empire is probably closer to 150 millions (it is Germany Austria-Hungary Denmark, Low coountries Congressional Poland).

That's not how level's in Overlord work. While you need a minimum level for using some spells, "levelling up" also comes with physical upgrades. Evileye (for example).

The 203 is probably around the equivalent of a Mithril-Orichalcum adventurer. So around level 15-20. Flight is a relatively common spell in the NW and something like their explosion formulas aren't too out there either.

Tanya I would say has a really high output IF she is using the Type 95 but when she isn't (that being 99% of the time) she is more or less as strong as the rest of the 203rd. She is just more skilled.

So remember to keep in mind that normally Tanya doesn't have her basically unlimited mana or incredibly powerful spells and she depends on her regular Type-95 orb.