Warriors are restricted to front line melee
Warrior: While a warrior may strike terror in the hearts of other classes, it is a simple challenge for a mage. Warriors are restricted to front line melee and depend on LOTRO Gold rage for their strongest abilities.
As long as you can keep them out of range you should have no trouble taking them down. There are some things to watch for though. They have two abilities that allow them to get into range very quickly.
Charge which can only be used out of combat, and intercept, which requires rage, if they manage to get into range be careful about casting because they will use pummel to silence you for four seconds. If they manage to get in range use frost nova to freeze them then blink away.
Warriors have incredible burst damage so you never want to let them swing. You may want to keep spells like ice barrier up just in case they do. You also need to be careful when casting that they don't equip a shield and use spell reflect.
If you do see them equip a shield, use an ice lance to eat up their effect. If possible, keep a frost ward up for just this kind of situation. Once you have enough range, start to kite them with frost attacks and use powerful nukes when safe.