Gems & Enchants (5.4.8)
Gems and Enchants allow you to customize your stats and choosing the right gems and enchants is critical to developing an effective Destruction Warlock. Use this guide to view the selected best gems, enchants, and profession perks to use for your Warlock.
Engineering provides the single strongest DPS gains of any professions with their perks. All other professions provide the same moderate DPS gain. Always use a profession perk if it is available.