Take this job and shove it

Skill points are determined by job level

In most RPGs people pay attention to character level and experience points. The more experience points the higher the level.

Job and skill points work a little differently. Once you've acquired a skill you need skill points to increase the level of that skill. It works out pretty simple. For each skill you need that amount of skill points to increase to that level of skill. However, you have to have done the previous level of skills. For example: to get level 5 in a job you first need to put 2 points for level 2, 3 points for level 3, 4 points for level 4, and at last 5 points for level 5. To get skill points you need to kill monsters and get job experience.

This is where it gets interesting because the monsters that give the most experience are not necessarily the best monsters to kill for job experience. I posted before a chart for lower level players that outlined the best monsters to kill at lower levels: Monster kill statistics. At higher levels you're looking at significantly more job experience points. Ice Elementals for example are in the 630 point range. Here is a list of a few I've recorded so far:

Skeleton: 1467 job experience
Poltergeist: 1265 job experience
Wisp: 1210 job experience
Lady Skeleton: 957 job experience
Drunken Skeleton: 530 job experience
Tipsy Skeleton: 493 job experience
Drunken Lady Skeleton: 389 job experience

Job experience can vary if someone else has hit the monster before. The poltergeists I was killing had hit points in the 10k region so they were not quite as nice to kill as the 7k skeletons. Spectres gave less experience than Poltergeists and are quite a bit harder to hit, so I didn't bother even including them. I'll update this list with a more complete listing soon. For now just realize that there's more to killing monsters than just plain old experience.