Just got back to Deadfire once again and I'm having a blast playing this build, so I figured I share its more important outlines. I'm sure I'm not the first to come up with something like this, but it worked amazingly well for me through the entire game. I hit 20 with it but haven't finished everything yet. Easily blasted through all the SSS fights and Memnok and stuff though.
Not sure if it can be played solo, as I don't really enjoy solo runs, did one just for the heck of it, but I prefer