I'd say that your dps is fine for that fight length.
Also missing an EDS might not be a mistake depending on the situation: You cast a DS and another EDS procs. Now you have to use FV to get the buff first and you can get another EDS proc from this cast. I didn't go through the logs to check if it was the case but since you casted 19 DS out of 20 procs, I wouldn't worry about it.