For Horde, Exodar wasnt too bad if you have an alliance toon that you can scout things out..
IF.. well.. just go naked, because that guard is most likely gonna get you at least once.. (I think he got me twice
Darn was annoying.. Once again though, if you have an alliance toon that can scout it out, you can run around the city and do pretty well. Darn is BIG with lots of room on the edges to go around..If you can fly, then it is pretty trivial..
Alliance... well.. lets be honest.. Blizz likes making it easy to gank Alliance, so UC is gonna be a bear.. once again.. go naked.. I think I hit it first thing in the morning and was only killed a few times.. Other than that, the other cities werent too bad..
This achievement is like the turkey killer one.. just go do it and have fun and its is pretty exciting.. If you in trying to get it done as soon as possible, then it can get frustrating..