the only two you can wear are bronze and iron
Granite armor is the best armor to wear with 51 defence members.
Proselyte armour.
The best armor to wear in Runescape I would say is Bandos, mainly because a nice combination on Strength bonuses with Defense.
Full Rune is the current best melee Armour for free to play characters.
Rune armor is one of the best types of armor. It's light blue and looks similar to mithril but is a lot better. It requires a defense level of 40.
There is no "best" armor in runescape, but armor such as the "nex" armor (Torva, Virtus, & Pernx) are some of the more elite types. Nex armor is dropped by the monster Nex in the gwd.
The best and most efficient way to train defense on runescape member's worlds is to train on rock crabs. Rock crabs have 500HP, low defense, and a maximum hit of 15, they also drop clue scrolls.
training at Baxtorian falls is the best way, but you need to be a member. otherwise train at demons in karambja
Best for what? It varies a lot, depending on whether you want to maximize your defense bonus, your prayer bonus (to make prayer points last longer), and - in the case of a defense bonus - what type of attack you want to defend from.
Plate armor is the best to protect from ranged on non members since arrows, bolts and ranged attacks are weak against it. The best armor to protect from ranged on non members is rune plate and d'hide chaps.
Just like everything else in runescape, saradomin is the number 1 best armor in runescape since it is the most expensive. 4-5 mil
Full void, that way you only have to change the helmets to get ok defense but excellent boost when attacking with appropriate weapons.