Take the Light as his strength, Gregg Reece face the demons of the Burning Legion, the undead of the Scourge, and soon a fierce battle with black dragons. Some people would lose interest in their own characters and either began playing less or trying to get a new one. There are some seeking useful guides about this. Take the following as an example. The first aim of gearing for tanking at eighty is to reach heroic dungeons, which leads to a constant balance at lower gear levels.
If you want to change enchants or trinkets so as to go back to the magic number. The magic number for heroic dungeons is five hundred thirty five defense skills. Just from being level eighty gives you four hundred defense skills so it is very likely that you cannot do this on gear alone initially. Thus you must want to grab both gems and enchants to level yourself up. However, You would still be able to run normal level eighty dungeons with a defense rating lower than that, which would also offer the opportunity to get some better gear, yet giving rise to some minor problems.
The higher goal is to reach five hundred forty defense skill or six hundred ninety defense rating on your gear. This was the uncrittable defense cap for raids. Since you get better gear, you can stop worry about gems and enchants for defense rating and obtain things such as stamina, avoidance and armor.