Be careful, they're quite vulnerable to cavalry and archers 
Yeah, orcs pretty much suck on their own, you have to support them with some regular troops. I find a combo of 3-4 Orc Raiders and 4-5 Snaga Hunters plus some cavalry works well for my play style. Orc Raiders have surprisingly decent morale, they can hold the line against militia and swordsmen long enough to encircle it from behind with either cavalry or another unit of orcs.

Yeah, orcs pretty much suck on their own, you have to support them with some regular troops. I find a combo of 3-4 Orc Raiders and 4-5 Snaga Hunters plus some cavalry works well for my play style. Orc Raiders have surprisingly decent morale, they can hold the line against militia and swordsmen long enough to encircle it from behind with either cavalry or another unit of orcs.