Training locations for Claw Rogues

* Level 10-13: Ok, you don't have your range yet. Too bad. Go to Henseys Hunting Ground and kill some snails for now. If you are feeling adventurous, go to the slime tree, and start de-sliming. Now that you have lucky seven, killing slimes are extremely easy, and you can outks even mages. If you are funded(with a higher level character), you can take some money and buy better stars and go de-sliming more easily in Ellina. Fear the power of assassins!

Another option for levels 10-14/16 is to kill orange mushrooms, they give more experience than slimes and can generally be killed in 3-4 hits. If you put your level 10 skill point on lucky 7, regular pigs can be killed using only 3 stars. Henesys Party Quest is a good option.

* Level 14-16: Go up the levels of Henesys Hunting Grounds. HHG 3 is generally the best open empty spot. Since it is very difficult to find pigs in numbers without the ribbon pig alongside it go and travel across all towns except for Perion and kill everything killable. Leveling should be extremely fast with wolbis or if you're funded kumbis or better.

* Level 17-19: Pig Beach. Your level 10 lucky seven is enough to kill pigs in one hit and ribbon pigs in two, and while it's not extremely profitable, you won't lose money, and will gain some from the occasional drops. And yes, nobody can outks you, not even a mage. WARNING: The very irritating Iron Hog will spawn in Pig Beach in occasionally. So watch out! If you managed to aggro it, cast Disorder if you have it.

The party quest is a great place to level as from levels 21-28/29. By doing this with either nice people or friends you can not only save money but also gain precious ores that you will need to make weapons later on. If not continue to follow the guide.

* Level 20-24: If you're going for the poor build, continue at Pig Beach. Training is going to get slower now, but bear it for now. If you're maxing Lucky Seven early, then go ahead and kill Green Mushrooms, and hope for that ever-elusive pan lid drops.

* Level 25-30: Green Mushrooms, or Horned Mushrooms at ant Tunnel. The former is more profitable, the latter is quicker (although, you will lose money). You could also try Jr Sentinels, but... they're annoying. Zombie Mushrooms are also an alternative if you have Kumbis or Iccles, you can easily 2HKO them with Lucky 7. If not, stick with Horny Mushrooms. Wild Boars can be an option too if you seriously think you have enough money to burn on potions, the speed of the boars are nearly the same as you.

* Note: Don't go to Orbis until at least level 30. This is because Jr. Sentinels have 600 hp, more than half of what a level mid to late 20s Rogue.
http://strategywiki.org/wiki/MapleStory/Thief_Guide