You're welcome - this is why I consider this one of the easiest medals to get, while the general opinion seems to be quite the opposite
The pain is till you get 10 from your own traps as a warrior or paladin, but as soon as you get 1 pre-set trap (it's worth a lvl 2 trap spell + 25% damage from lvl 1 Trapper medal bonus), it will gradually go up on its own, as long as you kite the enemies on the field of battle to land on it for a last hit