Well are you rich ? (in pds )
You should level up to 125+ and get a standstill shield/electro frame (both of them are 1pd or less). On the weapon side, you should get a red sword (with hit), a decent mono target weapon (like charge vulcans, or a double saber like demolition comet, black king bar/vivienne/double cannon).
I believe I have a few decent viviennes if you want to buy one.
This is just basic stuff, I'm sure someone will be more specific. Anyway, good luck =)