New to Pk'ing~Need Help

As you can tell, I am new to pk'ing. And super frustrated. Strength-57;Defense-45, Range-57. I want to work on using a g-maul for spec and attacking with a rune scimitar but these 80-99 ranged people really make me tilt and kill me so fast, melting my HP like crazy. Do you guys think bringing my def to 50, and strength to 65, will help me counter these mainly ranged people and start winning some matches? Or any tips that can help me counter these type of pk'ers? Thanks everyone