>>723170869
>>723174378
>>723174539
I actually have some experience with this type of situation in Modded Skyrim. I once made a sword-and-shield character and by the late game maxed out her resistances and armor level. With the mods I had installed she was basically immune to physical and magical attacks. She could stand in the middle of 5-10 melee enemies and tank hits for real life hours. There were two problems I found out about though.
The first was that she was a bit shorter than the men and so for some reason the physics were altered such that enemies could literally ragdoll her across the environment. This isn't a big problem because she's so tanky but it means that she kept getting punted to the ground while taking hits. With enough time this could soft lock her in a fight. The other problem were status effects. Sure she had 100% resistance, but any wacky spell or gimmick could slow her down.
Basically, an OP nigh-invincible girl - armored or otherwise - can still be defeated by just manhandling her.