GREAT issue. She-Hulk came looking GREAT, not because of her powerlevel, BUT because of her mental fortitude. The most recent issues place her as one of the characters with the strongest wills, in my opinion.
The Winter Guard NEVER defeated She-Hulk, and they never broke her mentally either.
It's revealed that Tchalla and Jennifer planned her "defeat" from the get-go, as an strategy against the Winter Guard, to find out what they wanted to do with Atlantis.
She-Hulk let them take her to the Red Room facility, knowing they would try to break her mentally for weeks. She was absolutely confident they would fail.
Tchalla had his doubts, and claimed that could shatter anyone, even a seasoned Avenger, and proposed to sideline her. She, then, said, if he did that, she would quit and would face the Russians on her own. She also said that she understood that the Red Widow thought that could break her mentally in the Red Room.
Great exchange here:
T'Challa: Are you truly telling me, Jennifer, for the the record, that you feel of sound enough mind and stable enough body, that you can say with confidence you will not break?"
She-Hulk: T'Challa, that's EXACTLY what I am telling you".
As to She-Hulk vs Namor, the fight takes place at deepest place in the ocean.
It lasts three pages.
She-Hulk swings, and Namor dodges. He punches her in the face. She grabs his face with her hands. He kicks her face, but she doesn't lose her grip. She slams him, and he is unconscious.
Also, Red Widow injects Jennifer's blood in her, which adds to the super-soldier serum that was already in her system. She becomes a savage Hulk like being. She also attacks She-Hulk, but she is quickly defeated. She lands the first shot. She charges again. She-Hulk and savage Hulk Widow trade a blow. She-Hulk lands another two shots and she is out.
The issue ends with She-Hulk getting to a gamma bomb of 68 Megatons, set by Red Widow to destroy Atlantis. Also, Perun and Chernobog are headed to Atlantis, but Thor intercepts them. Fight should happen next issue.