So as I went through the files, I found out Shade actually has unused voice lines where she calls the Techie, along with the Cloaker.

I decided to replace her Cloaker lines with the Techie ones, so now she calls both the Techie and Cloaker at the same time. I'm not really sure why Starbreeze didn’t use these — maybe they're saving them for Holdout mode.

https://youtu.be/gXnpxj-AdXA ( preview of the mod )

I also made another mod where she calls the Dozer and Heavy SWAT at the same time. I'm not sure if I want to release it, but here's a link to the unused lines she has for calling Heavy SWAT and Dozer together
https://drive.google.com/drive/folders/1XHL1LsGaAg1jeOpYNbQmzu2fnt7cHzXl

I haven’t found a clean way to add more unused voice lines yet — if I do, I might look into it more. If not, we’ll see.

https://modworkshop.net/mod/52390 ( Here another mod of unused voice line on road rage map in case you want to check it out