Hmm. Currently, I can't answer this question with 100% accuracy, and it's also something I haven't researched a lot into. When it comes to levelling, I'm more of a "dont look at your exp, just grind" type of guy. I don't really have any intention of finding exact formulas for this shit, but let me explain to you what I know.
For starters, each mob gives a certain amount of exp (as shown in the guide).
For this example, let's say..
The captain shuhamma. Level 98 and gives 292,538 exp.
What does 292,538 exp mean?
It's a base amount of exp that undergoes a whole bunch of multipliers before it becomes the actual exp that you receive.
Although you can only visibly see your exp in terms of a percentage, there is actually a number amount of exp that you have/gain.
As with all RPG games, (internally) there is an "exp table" which basically just lists the amount of exp you need each level to be able to reach the next.
Let's say that you're level 98 too. According to the exp table, the amount of exp you need to get from level 98 to level 99 is 2,611,145,432.
If there were no multipliers or funny bullshit, then you basically would be gaining 292,538 / 2,611,145,432 exp per captain shuhamma at level 98. This equals about 0.0112% exp per monster.
Anyways, I don't know to exactly what proportion each of these change things, but here are some examples of exp multipliers.
- Level difference between you and the monster.
- If you are above the monster, you will receive a decrease in exp. If you are below the monster, you will receive an increase in exp.
- Whether you're in a party AND have a party member nearby
- for party exp modifiers, you must have atleast one party member nearby
- The level difference in comparison between you, your partner and the monsters level
- If you have more than one party member near by, then it's a comparison between all members + the monster.
- What the exp distribution is set to (in party window)
- If it is set to contribution, the exp that each party member receives will depend on how much of the damage that person dealt
- How many members are in the party.
- The more people, the greater increase. This just means people in the party. It does not mean all members must be standing closeby to you.
- Whether or not you are in "teh flashy" - ie. blinking exp while your exp is currently less than the maximum you've ever had (ie. after death).
- The amount of HP you have remaining.
- At safe HP levels, this has no effect. If your HP is blinking (low HP remaining) then the lower your HP remaining, the more exp you receive. (Additionally, you get a crit rate bonus which increases further as your HP goes lower and lower)
- Whether or not you have a cheer activated on you.
- These supposedly offer a 10% increase in exp.
That's about all I can think of for now. I'm sure there are things I'm forgetting that others will add.