I finally got my WHM to 90 and can do level 90 content, I come from DPS so I play Reaper as my main, I'm pretty confident in my healing, still learning how I can be a much better healer.

I recently did a HS dungeon level 60 and our tanks health would just DROP normally I would green DPS until I felt like I needed to start healing but if I stopped healing for even a second the tank would just die, any other dungeon I do this isn't an issue.

We would W2W DROP FAST Tank would take 3 enemies? DROP I would try to cast holy so I can stun and do damage DROP

We wiped and kept thinking it was because I wasn't healing enough or I was having a bad night, but I was doing what I would always do even in higher end content.