Determining power leveling
The standard for battle length from here on out will be 30-40 seconds to defeat a monster of the same level while soloing. It would take about 4-5 seconds for a level 50 character to defeat a level 3 monster next to a level 1 character. The level 1 character can obtain the full amount of experience points just by standing there. However, the level 50 player involved is spending their time leveling up the other player instead of playing other content.

At this point, it depends how the level 1 character feels about being "helped" by the level 50 character.

Forcing out power leveling
It is not easy to distinguish whether the above actions are an act of good will or serve the purpose of RMT or leveling up other characters for money.

By investigating logs, it is possible to identify for-profit violators and mete out punishment, but it would be very difficult to completely put an end to these actions. Doing so would require implementing very complicated specs, which will place a strain on ordinary users.
  • Distribute experience points based on the amount of damage done to the monster
  • Distribute experience points based on hate
The above methods were used by first generation MMOs to reduce power leveling, but these methods have their own problems. Players can aggressively fight each other over experience points, classes that do not do much damage are at a disadvantage, and for-profit violators can create bots that randomly attack monsters and steal EXP. (As I said earlier, we will punish for-profit violators. However, we do not want to ban ordinary players, so it will take us time to properly identify for-profit violators.)

One thing we would like to avoid all costs is EXP stealing by bots.

Conclusion
Taking everything into consideration, we understand that there will be pros and cons no matter what, but ultimately, we have decided that as a current generation MMORPG we would like to do something about,

"new players who would like some help, because they want to play with their friends as soon as possible, as well as players who are willing to sacrifice their own time to help out new players get involved in the game quicker."

We plan on implementing end-game content that is extremely difficult, so if assistance is necessary to reach this point I believe that it should be OK for players to help each other out, as long as there are players who are willing to help out.

Differences in gained experience points based on the difference between the player’s level and the defeated monster’s level will still exist, and will be adjusted. Our goal is to prevent any kind of extreme behavior. If any loopholes are found, we would like to fix these issues as they are discovered.

I believe that whether a player is playing seriously or not is a separate issue from whether the player is receiving assistance or not.

Personally, I am the type who believes that it is more fun to work hard and experience as much as you can first hand up until at least level 40, but if somebody comes asking for help saying, "I tried my best up until level 30, but I don’t have any more time!" I will help out.

Of course you would want your friends to enjoy an MMO that you enjoy playing, and if somebody is stuck in a situation where their enjoyment is hitting a wall, you would want to help out. Ultimately, it would be best for everybody to get along and play together.
I think the last system of PLing is what he really wanted, but just not what many of the players wanted.