The Orcs had a huge regiment of 50 something Night Goblins(with 3 Fanatics), 20-30 Orcs, 2 Chariots, a Bolt Thrower, Snotling Pump Wagon, 15 Wolf Riders, a Night Gobbo Shaman, and an Orc Big Boss. I had a Beastmaster on a Manticore, Sorceress, 20 Spearmen, 12 Reapeter Crossbowmen, 5 dark Riders and a Reaper Bolt Thrower.
Straight away the manticore went to destroy the Pump Wagon while the Sorceress nestled herself just inside some woods and the Reaper Bolt Thrower almost desroyed a chariot, causing it to flee with the wolf riders and gobbo bolt thrower crew.
After dealing with the pump wagon; the manticore went behind some cover while the sorceress destroyed buckets full of Night Gobbos with Black Horror and lured out the Fanatics which couldn't harm anything and became a hindrance for my opponent. With a mix of Terror from the manticore, magic from the Sorceress and combat when units were severely beaten into a pulp. i won the game without using my spearmen or Dark Riders at all. 
The lesson is that when fighting Greenskins (and other armies with low leadership), get a terror causing creature in the mix and thin down large units with magic and missile power. Also, concentrate on one unit so if it flees, it may start a rout.
) makes Terror causing things worth their cost.
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