Major
- Glyph of Savage Roar
- Use: Your Savage Roar ability grants an additional 3% bonus damage done.
- Glyph of Rip
- Use: Increases the duration of your Rip ability by 4 sec.
- Glyph of Shred
- Use: Each time you shred, the duration of your Rip on the target is extended 2 sec, up to a maximum of 6 sec.
Minor
- Glyph of Unburned Rebirth
- Use: Your Rebirth spell no longer requires a reagent (Starleaf Seed at lvl80).
- Glyph of Dash
- Use: Reduces the cooldown of your Dash ability by 20%.
- Glyph of Thorns
- Use: Increases the duration of your Thorns ability by 50 min when cast on yourself.
I think these are the best glyphs Patch 3.3.0 to make large amounts of damage with a feral druid.