First you would have to decide your criterion for "best". You can go to hi-scores and see who has the highest score, if that is the criterion you choose.
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The best shield for a non member in stat wise is the Rune Kite shield however if you want rarity the You can go for one with a trim in the colour of the runescape gods.
Proselyte armour.
It say on the Runescape site how to become a member.
There are no magic potions or foods that heal all of your hitpoints on RuneScape. However, the best non-member food is swordfish, which heals 140hp. I believe the best member food is manta ray, but I'm not sure about that.
Black d'hide if your a member, green d'hide if you're not.
demon chamber in lamorack
the only two you can wear are bronze and iron
RuneScape subscription is when you suscribe and you become a member.
Granite armor is the best armor to wear with 51 defence members.
the best are rune galents for non mem for member it depens on what u are training magic, range , or melee.
Full Rune is the current best melee Armour for free to play characters.