if the -2bs thingy applies to snap shots (which is what I heard - nothing in particular about it applying to overwatch...) then Dark Reapers become quite the scary AA unit all of a sudden... pricey sure, but in addition to the Exarch doubletapping an Icarus on Interceptor, with twin-linking they'll suddenly provide something like 4 hits at S8 on average dice (assuming Starstrike missiles obviously), which is plenty enough to worry most any flier...