Experience
Experience is gained through killing monsters and leveling up tradeskills. Unlike classic, quests do not give experience.
Experience via Killing
Experience that an individual player receives from killing a monster is based on the amount of their AAs versus the level of the monster. Each difference in level between the monster and player seems to contribute about 20% (exact amount not yet measured) more or less experience. As an example, if a player at level 10 kills a monster that is level 10, the player may receive 100 experience. If that same player were to kill a monster that is level 11, the player would receive 120 experience points. If the level 10 player were to kill a level 8 monster, they would receive 64 experience points (100 * 0.8 * 0.8).
Players killing in a group will receive an amount of experience based on the single highest leveled person in the group. E.g., a player who is level 5, along with a player who is level 10 kill a level 10 monster. Both players would be rewarded 100 experience points.
Bonus experience can also be given for some circumstances. As a general summary, soloing will provide a 100% bonus to incoming experience. Soloing with a merc or someone of the same level will provide a 50% bonus to incoming experience. Grouping with additional people or of varying level may also provide some bonus experience.
The bonus formula is as follows: clamp(2.1209 * highest aa/ sqrt(sum of (players aa^2)), 1, 2)
The following is a spreadsheet of how this looks in practice is:
Experience via Tradeskills
Each tradeskill has provides a slightly different amount of experience per level up, with the general trend that more difficult tradeskills should reward additional exp. For example, fishing will provide less experience than tailoring.
The amount of experience rewarded each time a tradeskill levels up will scale with the level of the tradeskill. Such that leveling from 199 to 200 will provide significantly more exp than leveling from 9 to 10.