Warlock

Major

• Glyph of Life TapLevel 15Keep it up at all times: Life Tap gives you spell power based on your Spirit; cast it before the fight.
• Glyph of HauntLevel 603% more on a bonus that affects almost all your damage spells.
• Glyph of Quick DecayLevel 15Your haste speeds up Corruption, the heart of your Affliction damage.

Minor

• Glyph of Drain SoulLevel 15The only truly useful minor glyph: more soul shards without farming them.
• Glyph of Unending BreathLevel 15Slightly faster swimming for you and your allies.
• Glyph of SoulsLevel 68Ritual of Souls costs far less mana before the fight.