There are some Training Tips guide. This guide is based on what I've experienced in 9Dragons based on what to train.Read the following information.I feel that the guide is very useful to you.

1. Mobs that do not attack unless attacked first are usually better than those that do (for obvious reasons). However, at higher levels, these are fairly hard to come by. Usually, "beasts" are usually the least likely to attack at will. There are exceptions, however.

2. Level-wise, you will want to fight mobs that are yellow. However, most enemies are different than others. Things you will want to consider are whether they have a ranged attack or not, their ability to hit criticals and cause wounds, debuffs, and speed (but this is mostly for nukers). If all of the above do not apply, you can probably fight them in the orange stage.

DO NOT EVER fight anything 4+ levels higher 9 dragons gold than you!! (unless apparently, according to Broosser, you are a nuker. I have now confirmed it with my own nuker that it is possible to grind on red mobs which are +5 above your own level.)

3. I would recommend fighting with active kung fu at least cheng 3. If you learn a new kung fu, I would suggest fighting green-white mobs with a manual until your technique is cheng 3. Nuker skills can be used at around cheng 2... I would recommend training it at least a little bit before charging into combat.

A good spot to train it is at Song Shan (the shaolin headquarters) at the tiger found around the stone tunnel. It will not continue to chase you as long as you are in the tunnel. Also, at Zhengzhou, you can train on suspicious shaolin desciples, as long as you stay on the stone staircase thing. I'm pretty sure they do not climb, but try it out for yourself and see what you think. Unfortunately, you have to stop at high RC levels when they become dark blue.

4. This is pretty obvious, but... try to get into as many 9 dragons gold as possible. If it is individual exp, nothing really changes, except you are more likely to be revived when you die or be buffed. If it is a shared exp party, you are most likely going to do better than if you were just soloing.
5. If you are one of those people who just can't stand to grind, join a hero band. A good hero band with active members that like to talk. You will be less bored if you talk while grinding, and it's easy to get a party going.