This custom OST uses tracks from the entirety of the Heavensward raid series, Alexander.

Control: Metal - Brute Justice Mode
https://youtu.be/-pdqUzOH_Hg
Buildup: Rise
https://youtu.be/-IiOzi05IlA
Assault: Locus
https://youtu.be/3cKy5Qk0QMM
Stealth: Exponential Entropy
https://youtu.be/hb0P9jHV8dQ