You sound like a massive faggot, but since others will consult this as the jacket general for the next month or so:
1) You can use a polycotton/NyCo type top for something thin, tightly knight that the campfire won't rape. The concept here is they dry out before massively soaking through. Some use Fjallraven fabric (polycotton) for this, but you can also find milsurp like Austrian M65/Anchutz M75, American M-65, British CS-95, German Flecktarn (80 cotton/20 polyester). Most of those have one issue or another, but that is milsurp for you. CS-95 is loud, Austrian M-65/American M-65 has too many layers and doesn't dry out quick enough. German Flecktarn has too much cotton. Austrian does have some later version with goretex and sympatex too.
You can use a natural or synthetic wax on these too. Otterwax, Varusteleka makes a wax, Nikwax. It makes it less breathable, but worthwhile to put in high water areas like shoulders at least.
I think you'd have to know what you are doing to go this route, as if your jacket soaks through, you will need a plan B, or a midlayer like wool or fleece that can get damp without the chill.
2) You can do the gore-tex/sympatex route. Problem with these as is often found with ultralight is it will likely fail in a couple of years. If you want light/water proof goretex, it will have a shorter lifespan. I can see this works for purpose specific work, but will be a more expensive route. Go with all your modern companies, like Patagonia, Arcteryx, Outdoor Research, REI for this one.
Con: Expensive, fragile
3) Have a legit water proof coat that is most likely PVC. Problem with these are they are heavy, and often used for work like fishing, but would be too heavy and uncomfortable out. I have seen 3 recommended brands with these: Grundens, Carhartt, and Helly Hansen. Grundens seems to be the most recommended for workwear.
Con: Heavy
There's also shit like silnylon that I don't know much about. I know there's a few poncho makers out there, like...
