Question: where are the dormant siva clusters?
Answer: Clovis Bray 1.0 location (Archon's Forge) ... 
Clovis Bray 1.1 location (Giant's Husk) ... 
Clovis Bray 1.2 location (Giant's Husk, or The Iron Tomb mission) ... 
Clovis Bray 1.3 location (Outer Cosmodrome wall, or The Walls Come Down mission) ... 
Clovis Bray 1.4 location (Lords' Watch)