Guess the only one it would change place with, if it did, is Heroic Humming Blackiron Trigger. As the stat weights from that one and to Mythic Scales is over 100, and to get 100 stat weights we need about 25 more multistrike (Highest stat for sub).
- - - Updated - - -
Nevermind, the agi gain from Humming Blackiron Trigger it self give ~160 stat weights (just compared HC WF with HC = +21agi, so a little bit less than that), add that to the crit we also get from the proc over time, it will be better indeed.