Defense pures were extremely popular back in the day as they used Dragonfire Shield's special attack along with OSRS gold damage stacks of venom that come in Serpentine Helm to inflict harm. Users were very safe as they were equipped with high Defence and Hitpoint levels. Since this strategy is no longer practical as of now, Defence Pures aren't as popular as they were.
Maulers, also referred to as Obsidian Pure, do utilize Tzhaar's-ket-om weapon in order to defeat adversaries. The only requirement required to use this weapon is 60 Strength it is common for them to use accounts that have both Attack as well as Defence levels of 1. Through this method they can attain lower levels of Combat than One Defence Pure.
Similarly to the group above, G Maulers design their stats to be only enough to be able to carry an weapon of their choice. The weapon of choice is the Granite Maul, which requires 50 Attack and 50 Strength in order to use. G Maulers are usually at even lower combat levels than One Defence Pure, and at times, they could be more dangerous as Granite Maul special attack deals instant damage. Users who utilize the weapon are usually waiting while using it until their opponent's health is at a point where they can finish them with one hit.
It's a unique type of Pure which was not created through the simple process of gaining skills, but was a product of finishing Nature Spirit quest. A player with 13 Defence are usually aiming to complete Recipe for Disaster quest to get Adamant Gloves. They offer high Attack and Defence bonuses.
Furthermore 13 points of Defence do let them wear Black equipment as well as a Slayer Helmet improving their defensive skills further. It enables them not only to become more deadly in PvP, but also to be more efficient in combat with PvE, allowing them to maintain their account and develop non-combat-related skills. It's important to note that 13 Defence Pure is often willing to sacrifice a certain levels of Attack in order to buy old school runescape gold achieve less combat level.