How should i raise my damage

So my DW is lvl 162 and he hits 90K~180K and i want to raise the cap to manage hit 200k and make boss easier to me...

Here my equips:

 hat

 Face Accessory

 Pandant

 Cape

 Glove

 Overall

 Shoes

 Earring

 Shoulder

 2H Sword

 Jewel

 Belt

 Pandant

 Badge

I've got 4 rings:
1. Curbrock ring
2. Platinum Cross Ring
3. Epinea Ring
4. Lagendary Ring

Plus i forgot to add that i have the tresure hunt glass as eye accessory...

Right now i'm serching for a lvl 140-160 weapon but what can i change? what should i do to raise my damage?
(Stay in mind that I dont have lots of money...)