After my success with the Scum Firesprays I thought I'd take another look at Imperial Firesprays, the below list is designed for control through stress, then damage mitigation with PtL evades and Sensor Jammers as my opponents will hopefully be action less with stacked stress, resulting in less offensive output.

Kath - Mangler Cannon, PtL, EU, Tactician, Seismic Charges

Whisper - VI, Rebel Captive, Sensor Jammer, ACD

Comes to 97 points, allowing me to snag initiative before Soontir.

Thoughts? Any glaring mistakes? C/C please!

Oh wow, yes I like this a lot! Lots of control. Tactician is great on Firesprays. I don't see any problems with this build and would very much like to try it myself.

I agree -- good synergy with those upgrades. Should be fun, although will be a tricky list to fly, but I like these kinds of high risk, high reward builds

I've made good use of Calculation and Mangler canon on Imp Kath. I like your list.

Update - Dropping the Seismic Charges for Slave 1 Title (Even though it's Kath, heresy I know) and Flechette Torps for a range 3 stress option