Imperial Firespray gets no love.

Krassis Trelix + Heavy Laser Cannon + Agent Kallus

"Howlrunner" + Calculation

Academy x3

Blast the big bad with Kallus + Krassis reroll, leaves you free to take an evade action, giving 3 evade results in outside cases, Kallus doesn't care if you're stressed after a k-turn.
Had a single point floating around, so I took Calculation on Howlrunner to change hit/focus to hit/crit, but there might be a better use for that 1 point somewhere.
3 Academies to maximize Howl and block, also relevant on Firespray range 1 under rare circumstances

What would you change (other than "don't run the firespray it's garbage")

add slave1 title so you can add long range scanners for free;p 2 more 0 cost upgrade cards that should be on every firespray if you dont plan to use those slots for anything else! And i would prolly just take crackshot on howlrunner,

I like your Firespray.

I've been toying with the idea of Imperial Kath in a Kylo Ren list. In cases where Kath's target has "The Condition" you create a situation where the target either takes a crit or takes stress. The problem is deciding who carries Kylo, and what else fills out the squad. I'm in uncharted territory. I've never used my Firespray for Imperials.

Here's one of my rough drafts:

Kath Kylo (99)

Kath Scarlett (46) - Firespray-31
Calculation (1), "Mangler" Cannon (4), Rebel Captive (3), Slave I (0), Long-Range Scanners (0)

Kylo Ren (53) - Upsilon-class Shuttle
Push The Limit (3), Fire Control System (2), Inspiring Recruit (1), Gunner (5), Pattern Analyzer (2), Kylo Ren's Shuttle (2), Engine Upgrade (4)