The accuracy and defense of RS gold equipment increases proportionally with level-tier. As such, armour that is lv50 will not perform as well when compared to weapons of 90 levels. High-level armour is seldom utilized in PvP because of the cost. However, high-level weapons are obtainable because of the prayer to protect objects. Freedom is a defense skill which is vital for PvP with EoC. Rejuvenate, Reflect and Resonance need 37, 48 52, 55 Defense, respectively.
You can use potions to increase these abilities. Ancient Warriors' pvp armour requires 40 defense. Void, at 42, is the lowest level of cheap RuneScape gold nondegradable Power Armour. Fremmenik is at 50. In what way is this worthwhile? EoC PKing is currently nonexistent beyond warbands.