The problem is that War of the Ring suffers from a limp artificial intelligence and bland level design. In essence, the easiest path to victory is to simply outproduce your opponent. The end result is that beating most missions involves hunkering down in a defensive position and researching all the upgrades you researched in the last mission just so you can pump out the game's uberunits. Churn out about a dozen of these, lasso them with the mouse, and click on the enemy's base. Sit back, relax, and repeat the process in the next mission.