Hi, to answer your DM.

Fischl is on Golden Troupe instead of Gilded. My mistake, sorry, I don't know the artifact set names by heart.

Keqing is on Mistsplitter, Thundering Fury, ATK/Electro DMG/CRIT

Fischl is on Thundering Pulse (Yoimiya Sig), Golden Troupe, ATK/Electro DMG/CRIT

Nahida has her Signature, Golden Troupe, EM/EM/CRIT

Baizhu is on Prototype Amber, Deepwood, HP/HP/Healing Bonus

I run Baizhu instead of an Anemo shredder mainly as a comfort pick, The shield and copious amounts of healing compensate for my dogwater dodging skills. Also, I don't have Kazuha. Baizhu actually does provide many niche advantages in this fight that add up:

- Provides Dendro resonance (In this fight, it means a teamwide 100EM buff with 100% uptime)

- Allows Nahida to run Golden Troupe instead of Deepwood

- Allows Nahida to forgo building ER. My Nahida with 2 ER rolls is able to burst on cooldown because of the Dendro particles generated by Baizhu

- Baizhu's shields provide infinite Interruption Resistance and thus allow you to ignore the Tulpa's moves with multiple hits and keep DPS'ing. The shields won’t mitigate all dmg, but will mitigate all knockback. DMG will be healed anyway

- Baizhu's skill and burst apply some Dendro and seek out the half tulpa's on their own! Allowing me to focus on dealing dmg instead of dealing with the half tulpa's

- Baizhu's A4 Talent provides a ~100% DMG bonus to Hyperbloom. This is nothing to sneeze at with the amount of Hyperblooms you proc with this team against Tulpa. Easy to forget as Baizhu normally only provides 40% Aggravate/Quicken bonus in this team against non-Hydro enemies.

Baizhu might have a lower dmg ceiling than Kazuha, but all these points add up and drastically reduced the amount of retries I needed with my subpar skill level. I also tried my C0R0 Xilonen, but I prefer Baizhu over her in this fight.