Glyphs

You should get all glyphs for balance cause you can learn them once and then you will always be able to switch them out and back again as you like, but it requires Dust of Disappearance to remove them.
Full list of druid glyphs

Prime glyphs

You should always use Glyph of Insect Swarm and Glyph of Moonfire which are the two best prime glyphs. The third you should choose based on the situation.

I usually use Glyph of Wrath, but sometimes I change it to Glyph of Starsurge. It depends on the boss.

Major glyphs

Glyph of Starfall, Glyph of Rebirth, Glyph of Monsoon.

I choose these three cause of the dps increase of Starfall, and with limited rebirths in raid it’s always good to be able to ressurect players with full health, and it’s good with shorter cooldown on Typhoon for Ragnaros and Rhyolith.

Minor glyphs

I would recommend Glyph of Unburdened Rebirth so you don’t have to remember reagents to ress people and Glyph of Mark of the Wild to save some mana if you have to rebuff during fights. The last one you can choose whichever you like the most. Glyph of Dash, Glyph of Aquatic Form, Glyph of Typhoon.