Try the place in Shadowfall, the door with three skulls, the right of Dage's door, and go to teh right and enter the first door. I leveled up Darkside/Shaman pretty quickly(Also theres a secret achievement you can get if you defeat 100 skeletal soldier without dying/exiting) . Also teh Angry Zombies give you a fair amount of class points.
It depend on your level, like right now I'm level 50, i have to kill monster that are level 32 +
Exactly. You won't get Gold or EXP or Rank points from monsters that are to low of a level... Whats easy is to use the bot "Gold + EXP" in Le bot 5.4 or greater. The pirates/monsters will match your level so you know you will get rewards.
>Equip the class you want to rank up...
>Bot.. and in about 3-4 hrs it should be rank 10.