As far as memory serves, all Mastercraft items/sets are available to any non-members who can complete the quest. So far, there isn't a mastercraft of all elements, but Artix Entertainment is getting there.
default blade enchaned
Rune scimitar
Ungodly Reavers of Miltonius, and maybe Hex Blade of Miltonius
The best Non-mem weapon would be the Ungodly Reavers of Miltonius (though mostly members have it). But other than that... it would be Void Fangs of Miltonius. 2nd is Hex Blade of Miltonius.
A Rune Scimitar, mainly because of speed and attack damage rates.
artix non4m
There is no definite best non member weapon, it all depends on the monster's weakness and what kind of weapon your using against it. So in short, it all depends on the situation and monster's weakness and strengths. Like light vs undead yeh thats a good combo you get from yulgar.He has an entire cheap shop of paladin items (light not paladin)
the pest armour is the pladin and the pest weapons are in pvp arris battle spire and dooom weapon and frozen claymore
zombie bane spector
If you are a non-member, the best armour to get would be either Guthix, Zamorak or Saradomin. They all give the same stats I think but have different colours. Guthix is green trimmed rune, Zamorak is red trimmed rune and Saradomin is white trimmed rune. Even though they are just rune trimmed, it is still more stats than the normal rune. The best non-member weapon would be the rune scimitar because they don't have Guthix, Zamorak and Saradomin swords on there.
warlok
amour from a non member shop