Just asking, how did Ranma even find Nodoka in the first place? Unless
Genma told him before he died(although for what reason I can imagine, it's
obvious in the manga that Ranma didn't know that Nodoka existed or where she
lived). As for the phonebook theory, ie. Ranma finding her through a
phonebook. He doesn't even know where she live, she could live in Tokyo,
Hokkaido etc etc. What is he going to do, search every phonebook in that
area to see if he can find her?? Of course, Saotome could be a very uncommon
name, which would help narrow his search down, but he still would have a lot
of people to go through before he finds the right Saotome; Nodoka. And I
doubt he knows how to use a phonebook anyway, I can't imagine Genma teaching
him what a phonebook even is.
While it is possible for Ranma to find Nodoka, the fic has him finding
her too easily. I suggest making him work to find Nodoka.
Also, the sailor senshi Ranma thing has been done a wee bit too often,
you might want to think of adding something more to spice up the story.
Sining