Outside scarlet monastery, there are these mobs called "scarlet scout", they have 3 attacks, a ranged autoattack. melee autoattack & a ranged fireball. The trick is to get out of melee range, but inside the ranged autoattack minimum range. he will fireball you every 5-7 seconds, but do nothing else. you can farm these low level 20 elites solo for great EXP.