Congrats Dink, nice bull.
I have a Nallo 2 as well, what you need is a light bivy like a ptarmigan @ ti goat and pick up the footprint for the Hille. You'll still be around 3lb for shelter. I wouldnt bother with synthetic in that setup. I only take Syn on floats or any hunt where I dont have to carry it on my back. Which isnt much.
I've spent many nights in the Golite tipi and the BD Megamid, my vote goes to the Megamid, I sewed a jack into it (the Mid) for a pal who is now running a small cylinder stove. That setup is under 3 pounds too, with heat. I didnt care for the Golite, the construction doesnt lend itself to a consistently tight pitch without fussing. The floor plan in the Mid is more friendly for 2+ users as well. Cant speak to the Kifarus, they are out of my price range.
I'd stick with the Nallo. Stoves are just one more thing to fuss with when you should be hunting.