The same strategy is possible as in MoP Remix. It's just slightly slower because of the lack of Chi'ji.

Details on the wallclip:

1. Use Havoc Metamorphosis or Warrior Heroic Leap in the top left corner of the first room. (For some reason Vengeance Infernal Strike doesn't work.)
2. Jump up twice, then swim up.
3. To clip back in, simply triple jump up.

Items used:

• Wearing: Onyx Amulet with Wind Sculpting Stone, 3x Azerite Armor with the Longstrider trait, speed enchants
• Before entering: Bear Tartare, Elixir of Water Walking
• During run: Nitro Boosts, Quickwick Candlestick