yum_tea You're going to have a hard time until you actually get skills. Even passive skills like Increase HP Regen or Spear Mastery would help you level more efficiently.
Evil Druids and Wraiths should tide you over 'til 85, at which point you should switch over to killing Dark Priests until 90 and then grab an ice weapon and fire armor to go to Magmarings until 99. That's the easy way. There are, of course, many other places to level. You should use the iRO Wiki Database to search for monsters 10-15 levels higher than you in order to maximize your EXP gains.