What the blazes is SP farming?

It took me longer to get this information than I care to admit, so I'll assume
you're having a hard time finding it too. Well SP farming is simple in theory.
You're sacrificing EXP for SXP. Which means you level up slower, but you get
Skill Points faster. It's measured like this.

Your Character's level - Your highest mastery level = SP GAP.

This SP GAP caps out at 9. But the higher your gap the more SXP and less EXP
you'll gain. Explained in greater detail below.

Monster stats:
Made Up Monster Flon
300 exp
50 sxp

example 1:
Your character level is 20, and you have 20 Heuksal mastery and 14 fire mastery.
Character level (20) minus highest mastery (20) gives you a gap of 0.
**If you kill Flon, you will get 300 exp and 50 sxp.

example 2:
Your character is level 20, and you have 15 Bicheon mastery and 14 force
mastery. Character level (20) minus highest master (15) gives you a gap of 5.
**If you kill Flon, you will get 100 exp and 75 sxp.

example 3:
Your character is level 20, and you have 5 Heuksal mastery, 5 force mastery,
5 fire mastery, 5 cold mastery, 5 lightning mastery, and 5 bicheon mastery.
Character level (20) minus highest mastery (5) gives you 15. But the maximum
gap recognized by the game is 9, so you have a gap of 9.
**If you kill Flon, you will get 16 exp and 100 sxp.

**These ratios are slightly estimated. They are just meant to explain the
concept of SP farming.
http://www.gamefaqs.com/computer/doswin/file/930711/43300