General Luminous

Merching Question, Please help me out Hello. I am Desi a level 201 luminous and today I wish to ask questions. Frankly I am quite weak because I have never bought any good equips or cubed a thing. My damage is only about 60-70k range which randomly goes to 90 sometimes. I will be getting nx soon due to a special event and will be trying to sell it. -with my bad merching skills- I am going to get about 100k. After I sell the nx for mesos -hopefully XD- What should i focus on buying? My weapon is the only thing good, it provides atleast half of my range. -not sure how good the wep is to ya pros- So please just help me out by letting me know what to focus on. :D