#1 - May 12, 2017, 3:15 p.m.
1. crash lightning 2 training dummies to get the CL cleave from SS buff up
2. Stormstrike a training dummy until you get a stormflurry proc (echoed SS)
3. observe log for order of application of damage and buff events
3. buff application for manual stormstrike matches buff application for stormflurry proc SS.
Manual SS: MH SS, OH SS, Crashing Lightning 1, Crashing Lightning 2, SS cleave damage
MH SS, OH SS, SS cleave damage, Crashing Lightning 1, Crashing Lightning 2
You can see such an event in the log here:
Not sure which is correct but it does create an inconsistency. Cleave from the stormflurry SS is weaker because the buff to it comes after it happens rather than before like with a manual SS.