I just got rank 1 on all bosses as a resto druid on normal HFC… Almost, some 1 sec kill is beating me on kilrogg where they did a total of 1,18 mill dmg.
https://www.warcraftlogs.com/rankings/8#difficulty=3&metric=hps&boss=1786 They are not the only one, there are several 1 sec kills that seem buggy.