Haven't tried the firesprays in a while. I always meant to try out a paired list, rather than just 3 x Bounty Hunter. Mentioning the Firespray in the Fleet officer thread had my thinking, and finally got a list I liked.
Might work, might not. Nice to note that Kath can really use her special ability with some of the new hardware coming out.
Note that these are the Imperial versions, not the Scum ones.
(39) Boba Fett
(1) Veteran Instincts
(3) Navigator
(0) Slave 1 Title
(4) Engine Upgrade
(2) Fletchette Torpedos
(38) Kath Scarlett
(3) Marksmanship
(2) Mercenary Copilot
(4) Mangler Cannon
(3) Experimental Interface
Essentially a classic supermanouvrable Fett, but with a Fletchette shot in his back pocket (because he has the Slave 1 title for reasons), to allow him to throw a bit more stress into the pot.
Kath's loadout may be overkill on criticals - normally getting more than 1-2 crits is irrelevant as you only expect to get one or two hits through most people's defences anyway, but Kath gets mileage out of cancelled criticals, so turning most (or all) of the dice to critical results is a big deal.
I reckon that a Mangler cannon shot with Target Lock/Marksmanship has a pretty good chance of landing three criticals - even if you avoid damage, that's a plan-buggering three stress tokens you've just racked up.