Hold up, might've spoken too soon... I'm not experienced enough with the event view to exactly be able to tell which is which here and would appreciate some outside confirmation. Going through it, I was able to find one instance in which arcane shot multistriked, but there was only one serpent sting tick that followed...
Every other instance of an AS that gets a multistrike is followed by at least 2 SrS ticks, however. Cannot tell if both the initial AS and AS multistrike are applying the SrS tick. Definitely would like a more experienced log parser than I to puzzle this one out, as it has pretty good ramifications for gearing and shot priority.00:01:23.742 Promethieus Arcane Shot The Butcher 3158 (Multistrike)
00:01:23.742 Promethieus Serpent Sting The Butcher Tick *9522*
00:01:24.036 Promethieus Black Arrow The Butcher Tick 4742