You must be at least Level 31 to open or receive this quest. See Elyos 31 for more quests that can be started at this same level.
† All quests reward XP but NCSoft is fond of changing the amounts frequently, to the point that it is simply not wise to try to track the exact amount in a wiki.
To talk to Voice of Arbolu, you can stand on the black rock at 203.6, 1615.8, 124.2. You can copy the following and paste it into chat to create a map link: [[pos:Talk Here;210040000 203.6 1615.8 124.2 -1]]
According to advice from a player posted over at AionArmory, you should concentrate on the Agrints, as the Rotrons are harder to kill since they can heal. Sounds like good advice. I remember seeing a few of the Motheaten Agrints near Arbolu's Haven, towards the Lepharist Research Center.
This quest has steps, hunting areas, or mob targets in common with the following quest(s).