This skip was found by me. You can get to Ragnaros much faster after having defeated Majordomo, by using this DH-specific wallclip.

Details on the skip:

1. Stand under the ledge shown where you can't jump up.
2. Use Vengeance Metamorphosis.
3. Use Infernal Strike on the edge of the two textures.
4. Triple jump forward to clip through.

Usually these types of wallclips work on Havoc as well (Eye Beam + Havoc Meta), but not this one for some reason.

One question you may have then, is why not do the whole raid in Vengeance? Well, Havoc Metamorphosis resets after each boss, which gives you an extra jump every single time. Also, Fel Rushes give you more distance overall than Infernal Strikes. So going through the majority of the raid in Havoc is worth even if it costs you a specialization swap.

Items used:

• Wearing: 515 ilvl Mastery pieces, 3x Azerite Armor with the Longstrider trait, 2x Lv70 Mastery crafted Dragonflight gear (with the Blue Silken Lining embelishment), speed enchants, Mastery & Movement speed gems
• Before entering: Fried Bonefish, Charged Phial of Alacrity, 2x Hissing Rune, Pep-In-Your-Step
• During run: Nitro Boosts