WotLK enhancement glyphs - optimal setup?

[zayren2]

Hey guys, i've been wondering, for a while, which is the most optimal glyph setup for enhancement shaman.

I feel like glyph of stormstrike is a must, but the other two options are not so clear to me.

Currently have glyph of windfury and lightning bolt but was wondering if glyph of flame shock and feral spirit would be a dps increase

Every guide says the windfury one is a must but i feel like 2% is so little

Would love to know what you guys think

for pve btw