Hi!
I usually parse 95+ for preservation evoker damage in M+, and I think your damage rotation and talents aren't optimal. If you use Nozdormu's teachings, empath, flow state, natural convergence, and lifegiver's flame you can crank out significantly more damage in M+ by using stasis with temporal anomaly and empower spells without sacrificing healing. Extra essence bursts & essence from empath can go into disintegrate or echo depending on if you will need raid healing in the near future.
(example logs https://www.warcraftlogs.com/reports/4NFDwgzndTtC1HQh#fight=last&type=summ