Units
Laborers
They can be the difference between a win and a loss in this match-up. Only one extra laborer is necessary in this match-up as you have to expect to lose your Lumber Mills quickly and so purchasing more laborers will not have the time to earn their cost back.
They should also be used to claim more Lumber Mills for you, so-as to save your Uruks time; delay your opponent rebuilding Lumber Mills by using waypoints (explained more later); spy for you; and even harass your enemies laborers.
Uruk-Hai
The strongest infantry units in the game, as well as the quickest. In this match-up their usage is vital to success. They should never be stood idle and be on the move harassing your enemy's Lumber Mills and base. Use their strength under War Chant to survive and kill important structures such as your enemy's Lumber Mills or Uruk Pit.
Uruk Crossbows
Used predominantly in late game to help deal with the threat of Saruman and often used in a combo for increased value at base attacking or fighting large battles.
Pikemen
Isn't needed in this match-up unless your opponent makes Wargs. They can be used to secure mills during the Warg phase and combined with Uruk swordsmen for attacking the opponent's base.
Berserkers
Another of Isengard's most important units in this match-up. They can quickly destroy your opponent's Lumber Mills and are good at defending against harassing Uruks. They also make a good addition to any base attack because of their damage and rate of attack.
Warg Riders
Used just before or just after upgrades depending on how you are doing in the game. They are a very useful counter to Uruk-Hai and are able to take map control quickly. They can be effective at base rushing with War Chant and used in late game mainly to destroy siege.
Lurtz
Again, only seen if the match goes into the later stages. He makes a good addition to an army as he levels up quickly amidst an army of combos and can be useful in killing your opponent's heroes.
Saruman
He is vital in this match-up if it surpasses early game. He is very strong versus Uruk-Hai with his Wizards Blast, Fireball and Wormtongue. His leadership is also key to producing a winning army.
