You need to improve your gears in this order:
Claw > WG > PAC > Shoes > Stars.
Remember attack is always greater than DEX or LUK. If my calculation is right, you should have at least 40 DEX atm. Popular claw is Craven which need 140 DEX, that means you are short of 100 DEX more. If you stay with DEXLESS, you save 100 DEX or LUK, which equal 15 att. What does that mean? That mean, your att range atm is the same with a normal dex NL with 62 att craven. Now if you want to improve your att range, you should get enough DEX to wear Craven. I believe 65 att craven is around 260m, 70 att craven is around 900-1b. 14 att WG is around 250m, 16 att WG is around 600m.
To get 100 DEX: 15 DEX robe ( 30m), 10 DEX earring ( 80m), MON 5 DEX, Belt 3 DEX, Glasses 1 DEX, Cape 4 DEX ( with some attack), Shoes attack with 4 DEX, Pants 12 DEX, Shirt 2 DEX. That's 55 DEX from gears, you just need to add 45 more DEX from your AP when you level.