This Page is only about the Orc's strategy, playing mainly against human players. Human and Orc strategy varies in the style of which they are played. In my opinion, the Orcs are the mightier race and are the best to play against other human players on land battle.
Blood Lust
Blood lust is the ogre-mages magic powers. Orc's main, and best weapon against opponents is their bloodlusting abilities. Without bloodlust, orcs are simply pathetic.
The best way to use bloodlust is by using the keyboard. The key "B" on the keyboard is for bloodlust. Simply group 9 ogre-mages together, then, with one ogre-mage bloodlust another ogre-mage, and then use another ogre-mage to bloodlust other ogre-mages and so on. This way, each ogre-mages bloodlusts another.
Death Knights
The Death Knights, or simply called dks, are very useful in a lot of cases. But their best weapon is the "death and decay" spell. It can wipe out entire peons getting gold, and towers. Here are some of the dks usefulness.
1. Surround the dks with ogres or grunt so that the enemies can't get to it. Use Death decay on your enemies towers or peons. Press the key 'd' for death and decay.
2. Haste. When using dragons, use the haste spell on the dragon so that it can move faster and attack faster.
3. Death Coil. When defending against gryphons or other dragons, instead of axe-throwers, use death coil on the dragons. This way, the dragons will die faster individually. Use death and decay if there is a bunch of dragons at one spot.
4. When using the unholy armor, the best way to do it is use it on either dragons or other dks. For dragons, protect the dragons from archers and guard towers. For other dks, bring the dk up to the enemy, and then use death and decay right on the dk (your dk won't get harmed when unholy armor is still effective).
5. Whirlwind. Use it on peons getting gold, the effect travels and wears off slowly, can cause a lot of damage.
6. Raising the Dead is totally useless when playing against other human players on the net. It is a waste of time, waste of magic, and a waste of money. Recommendation: Don't use Raise Dead!