I rock a Jakobs FL4K… not going to suffer a Youtube video to see a build, but here’s mine as captured in the stills below.
I don’t think there’s anything unique about it other than the pet selection, and frankly, I often respec and rebuild FL4K exactly the same but not select a pet. This way, I can use Fade Away as an actual stealth mechanism to sneak around maps to engage enemies from unique vantage points (rooftops being my favorite). The Unseen Threat comes in to play here, and my goal when doing this with any given mob is to clear them out without any of them ever turning red on my minimap. I do think it’s possible to do this with other rifles, but frankly just haven’t tried yet.
Otherwise, the Scorcher in this case is mostly used as a distraction… my other two FL4Ks are way more focused on actual pet kills.