Hello, What should i look for on a rogue BD?

Hello, I am level 20. I chose a blade dancer rogue because I find that class fun. But, I keep getting minion drop gear and I am getting sick and tired of seeing minion damage crap on my armor and daggers… How can I improve more survivability / dexterity leveling? I am currently at dexterity 7… Level 20 now… Let me know thank you kindly.