I always went to the Gelinka to train at a high level. You get 1500-3000 exp and 150-300 ap, depending on which monster you fight. And since there is a save point nearby, all you need are a couple of tents and you're good to go. I recommend getting some Rune armlets (double growth) if you go here. And you can steal Aurora, Fire, and Bolt armlets. And the best thing is, you don't have to use up and duplicate elixers to fight them! (But watch out for Emerald Weapon. Sometime's it sits in front of the Gelinka, waiting...the cheeky git.)