I went to EQ atlas to look for named info in Runnyeye today, and i noticed it shows the ZEM on the website.
Went straight to sol a to see what the exp modifier there was...
http://www.eqatlas.com/solusekseye.html
13% bonus
From what I've heard, that leads me to believe sol a zem is a little to high right now...
Reiker is right though. Purely on the rate you could kill the gnomes on sol a, it was the best exp in classic.