All armour of lvl 50 comes with the RS gold same stats and it is tied. There are 3 classes that armour such as range, mage, melee and melee. Tier 50 armour: rune batwing, and blue Dhide. All of them have the identical stats. They're simply different classes. Someone who is able to range the rune of a man will have the exact DPS stats as someone who is a mage. A lot of things were nerfed or buffed. Deadly red spiders could provide over 200k xp/h of xp using p2p statistics at 90+ cmb.
It's been improved. It's not about just doing the same thing over and over until you're dead. You must be proficient in precision, timing and cheap OSRS gold memory, planning, and the ability to react. A bronze-clad man who is adept in timing precise, reflexes, and prediction might be able to beat the rune player who is clueless.