Board Thread:Boruto Discussions/@comment-43605697-20190824124948/@comment-1411686-20191028001904

Raikage- we dont know but i seriously doubt Darui has surpassed A4 or A3. the others maybe we literally don't know.

Mizukage- Definitely hasnt surpasses Mei or engetsu, unlikely Yagura, but 1st/3rd unknown.

Tsuchikage-definitely nowhere near Onoki or Mu, maybe the First. we dunno

Kazekage-Gaara has surpassed Rasa, probably not the 3rd and no idea about 1/2.