Mage

Major

• Glyph of FrostboltLevel 155% more damage for your main spell; the lost slow is useless in raids.
• Glyph of Eternal WaterLevel 50Your Water Elemental stays for the whole fight; Freeze, which it loses, is useless in raids.
• Glyph of Molten ArmorLevel 62More critical strikes for all three specializations: the glyph shared by the three trees.

Minor

• Glyph of Arcane IntellectLevel 15Arcane Intellect and Arcane Brilliance cost half as much mana.
• Glyph of Slow FallLevel 15No more feathers to carry for Slow Fall.
• Glyph of the PenguinLevel 15Purely cosmetic: your Polymorph turns the target into a penguin; any other minor glyph works just as well.