You can't power level.... you can assist on quests that require you to kill things.
That's it.
Best way to level:
- Party. Find people doing similar quests to you. Be the asshole not contributing and leech while they do repeatable quests and you do main quests.
Or help them, your call really.
- Quest books. They go with the main questline. Follow the level count. Do them in the order that they appear levelwise and you won't miss stackable quests.
- Guild quests. Requires you to join a guild first. Optional obviously, but there's a guild quest for every/every other level. They line up with above and dungeons.
- Lvl 45-50 solo Veninfang. Piece of cake, yet rough around the edges sometime. Requires +spd% gear and I can help, etc.
It'd be nice if Steve and Shig were same level with my cousin so I can run you all through once instead of 3 separate times... sigh.