alright I just finished with the information on the kingdoms. I edited the original post and added it there.
@61 Argent Feathers Seal Evil to answer your question, water Genasi can be found anywhere. As for the port city part, The Ronesko Empire and the Kingdom of Lorwyn both would have ports
I'm gonna push the start date back by a week cause I totally forgot to put the details on the kingdoms up and specify why the races without their own kingdoms don't have their own kingdoms. Sorry for the inconvenience. I should have that information up in the next few days