Weapon tiers:

Wood/Stone
Flint
Copper/Bronze
Iron/Chitin
Silver
Black Metal

But what I am thinking you want is a rating of the various types of weapons within each tier against each other. Here is my general order.

Mace,Dagger,Axe,Bow,Spear ... and that is about it. I don't ever use swords or two handed weapons. Spear could possibly swap with dagger just because it has low material cost. But then again, dagger is no speed penalty so rates higher. Ok, dagger over spear.