If helpful, here's what I ran last year (I switched from a TarpTent Rainbow Li). This setup below (before sleeping bag/pad) weighs 1.9125 pounds.
- Seek Outside Silex, the Dyneema one. I pitch it with trekking poles
- Alpine Ascent Bivy.
I keep my pad and sleeping back in the Bivy. Just roll it up in the morning and you're good to go. I also use the Silex during they day for shade protection and for random rain.
Curious what you've gained when the Rainbow Li weighs 1.6 lbs?