It seems the problem is about your talent and lego choices. I looked your Kingaroth and Varimathras combat logs and I couldn’t see the Cloudburst Totem. For Kingaroth you should use Ancestral Guidance and use it on add phases. For example; beginning of the first add phase, ending of the second add phase. For Varimathras Velen might be a better lego choice. And again, you should use CB too.
As I see, you are playing with same style on all encounters: Crushing Waves + Echo + Ascendance. This build cannot help you on all encounters. In some cases, AG + CB + High Tide is so much much better than your current talent build.