For guild members: Increase your level to 50. Each execution mission gives guild experience. The more experience the more guild level and more bonus you can get. Remember, doing missions on Abyss difficulty in party from four your guild members, Guild gets more experience in the amount of 1500 experience for each mission. If you perform any Nest in party from four your guild members, Guild gets 3000 experience.
How to quickly increase your level? First, increase the level to 16, it can be done in any dungeon, the appropriate level. For example, in Raders Den or Raiders Ambush Point. Next, you need to find a booster (people with a high level) and go with him to the Dark Tower Magic Institute, and increase your level to 24. Then, you can increase your level to 26 in Sanctuary Core and go to Dark Overlord Keep or immediately go to Dark Overlord Keep (in party), where increase your level up to 32. After, go to Forsaken Islet Core (in party) and increase your level up to 40. Next go to the Dragon Follower's Base (in party) and increase your level up to 50. All dungeons better to perform on the difficulty level of the Abyss. This gives not only more experienced but more useful loot, like codes or stamps.
