I'm not a seasoned raid veteran, but I learn quick. I had my warlock and found a group for hard crota checkpoint. Everyone starts killing acolytes like normal. A knight dies, I'm like oh, ok. They proceed to kill all the Knights without spawning orbs. I asked the group if they usually spawn orbs with the Knights for health, it was silent. Finally someone says, ahhh, no? It was late, I knew I should have explained, but 5 other people in a hard mode crota check point should know, right? I left right there without saying a word, because I knew there was no chance we were going to bring crota down.