You can defeat the 3rd boss from below. It is slightly easier with a target macro. This skips having to go up (and down) the elevator.

Items used:

• Wearing: Onyx Amulet with Wind Sculpting Stone & Harmonic Music Stone, 3x Azerite Armor with the Longstrider trait, Scroll of Momentum, speed enchants
• Before entering: Fried Bonefish, Charged Phial of Alacrity
• During run: Nitro Boosts, Quickwick Candlestick, Gunshoes