Single target show the values pretty close, mastery>haste (4.73>4.31).
3 target clearly shows haste ahead of mastery (8.26>6.89)
I thought the consensus was Multidotting made us lean more towards mastery, not haste, with all the MG changes and RPPM trinket nerfs. Makes me wonder if simcraft took the haste not affecting rppm trinkets into account or what. (Using H Hydra and H Wushoolay). It's frustrating because stacking mastery would have made an AOE destro or burst AOE demno spec easier to manage.