BDSHOT300 on Pixhawk 2.4.8

Hello
I have a Pixhawk 2.4.8. I have a flysky RX so I am also running IBUS telemetry (custom build). I was planning to flash Bluejay on my Blheli_s ESCs to get Bidirectional DSHOT. I assume that this gives me ESC telemetry on the same wire as the signal wire (correct me if I am wrong). I am using AUX1-4 for motors and MAIN 1-3 for a Servo Gimbal
So, will a custom firmware for Pixhawk1-bdshot with IBUS telemetry work for using Bluejay and ESC telemetry on the same wire on this board? Will I be able to set up notch filters? Can I use DSHOT300?

After building, I get three files:
i) Arducopter.apj
ii) Arducopter.bin
iii) Arducopter-with-bl.hex

Which file to flash?

Thank You !

Edit: I have some BLS_MAX 30A ESCs which support oneshot125, which I am running. How do I connect to blhelisuite with these escs? attaching a link: BLS-MAX BLHeli Series 30A ESC with Oneshot – Indian Hobby Center

any hope to even run Bluejay on these? If yes, then how to?