When I was talking about solo healing it before the patch, I was actually doing it without our group throwing the adds over the edge. The encounter is definitely harder now, but I think it may have just been a bad group I was in. I ended up running it a few more times later with a different group, still solo healing it.…
Just thought I'd bump this thread, after noticing this issue myself and then searching for a thread on the forums. Casting divine glow with channel divinity on does indeed actually lower the damage of your party members. I don't know why so many people are recommending this ability without mentioning to never use it with…