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)
you cannot make a weapon in adventure quest worlds
zombie bane spector
You can get it from drudgen
Yes but you have to be a member and they do nothing for you.
Drakath? I think Member.
on quests
You cannot.
This weapon is limited. You can only get it on special events.
on the adventure quest worlds wiki
I use the Lucky Sword but the Bejeweled Blade is also good
It is a different set of who, where and with what every time you accept the quest.
For non members the piston driven polarm.