Weapons used in "Harvest Land" dragon races are generally the same. Each dragon race monster will offer you several different weapon options to use. While they vary slightly they are fairly standard throughout all races.
Even lower-level players can contribute to defeating monsters in dragon races. The most commonly used or needed weapons for races are bows, spears, axes, and silk nets. I have never seen or needed shields or regular nets for attacking dragon race monsters.
Outside of using basic weapon options in harvest land higher level players will be able to use magical weapons. Magical weapons in "Harvest Land" are the fastest way to defeat monsters in races. The hit points for magic weapons are much higher than common weapons.
To make defeating the monsters a snap, stockpile common weapons like bows and spears. They are the lower point weapons, but they also are faster to produce than their magical counterparts.