Ran Seductive Subterfuge Heroic in Caverns of Endless Songs, twice. Only found two collectible each time I ran it. Others were no where else in zone. I ran end to end, all the tunnels, all of the water areas, all of the far edges, nothing. The collectibles I found were in same spots, both runs. Need to ensure all 4 collectibles are spawned in regular sight. Ozadar of Zek