The dynamic in the Kitty Cold War is shifting slightly. We've been letting the cats interact in the mornings and at night and making an effort to pay attention to both of them, which is gradually making Dasher more assertive in defending himself, particularly when either laurie_robey or I are in the immediate vicinity. When shots start actually firing he still prefers flight over fight, but he will get to a point where he says, "This far, no further!" and start hissing and spitting back, at which point Buddha is stymied and they crouch down into an impasse to sulk at each other. Dasher also has taken somewhat to needling Buddha, in the sense of going to places he knows that Buddha will want to chase him away from. My guess is that he's trying to get a map of just where all the boundaries really are.
My general strategy has been, once they've both had their dinner and their pettins, to go on with life as normal as much as possible to establish a routine. Unfortunately, Buddha's routine is becoming "corner Dasher somewhere and stare at him," while Dasher's routine is becoming "find a corner and sit there, wishing somebody would come rescue me."
We did get the Feliway diffuser, as well as some new toys to distract them with. We're still investigating other techniques to bring peace to the household.