Yeah, Gusgen USED to be my favorite, until the gilsellers drove me insane ; ; I'm glad you're still enjoying it, it's good money and not a lot of aggro from the mobs (40+)
Unfortunately the gilsellers will get to you eventually. If I had the first clue how to MPK, I'd MPK Careerwoman, Oneman and Andea until they were all level four. Then I'd do it again.
If Movalpolis is working out for you, stick with it. Basically you're working with the best stuff there is until Ifrit's, and mining in Ifrits involves a willingness to die that this Elvaan just ain't got. If one more Volcanic whatsisbutt beats me to death, I'm going to cry.
Stick with Gusgen and Movalpolis for now, it's probably the best there is for your lvl. When you go insane, try logging, it's a little less gilsellered to death.