If you're really new to this game, do read the guides section. Basically your main attack is MA, use all your bonus point in MA. Next is LK, its luck ,determine whether you magic hits or not. Going light means you you got support, some AoE, and most important the Shield of Heaven where you do not worry about your safety. No Dot, and not so high DPS. Going Dark gives you more stronger 1on1 skills, some DoT, and you need to mind your safety.
Another option is to go hybrid, you can gain AoE and damage amplification.
Going ingame money only, means you gotta plans things carefully. Going MyShop, you can haxx your stat a lots.