Most Goblins travel in packs, individually weak, in numbers they can become quite the menace. Goblin Rogues however can go it solo, their small size makes them light on their feet and great at stealth, what they lack in strength is made up for by their speed. 

Weilding dual daggers with posion tipped blades, your strength and numbers mean little, a strike from one of these and it's game over.