since you already bought some essentials the cannith challenge pack might be interesting.

It doesn't offer much depth or storylines, but it does offer proper gear and you can fill up any xp holes with the challenges because the amount of xp does not decrease over times doing the challenge (besides the first time bonus you will only get once and the star ratings).

it can get tedious but with this pack you can be certain to have some proper gear and you can get from level 4 to 20 with this pack alone if necesary.