I’m trying to figure out why conduit Indelible Victory rated so high for Raid Tanking without taking Impending Victory. I can imagine some situations when it can be counted useful for Mythic+ simulations but have no idea about one single boss. Maybe I miss something?
I’ll need to see your specific case to answer this. Use the help link above the gear table and follow the instructions to create a snapshot id and post it here. With that I can see what you are seeing.