Subscribe this person for me, it's where I got this OST from:

https://youtube.com/c/ReimuHakureiTheWonderfulShrineMaidenOfParadise

Touhou 18 Unconnected Marketeers OST - A Rainbow Crossed Gensokyo

DDC Stage 6 - The Exaggerated Castle Keep.

Just a big playlist of all the complete tracks. Complete = Normal Versions and Spirit Trance Versions mixed by Zun.