1. Don't get hung up on sag. Particularly on forks. Particularly with Debonair spring. Particularly on modern geometry.
2. The guide for your weight:
RockShox Setup Guide | SRAM
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I'm 86kg riding weight on a 29er Team (170mm Lyrik) but the recommendation is about the same.
First, the rebound is too slow for me at only 7 clicks but... 9 or 10 clicks out is perfect. Consider the range between 7 and 11 clicks as viable. Forget about your 15 clicks.
3. The air pressure guide is funny because the air pressure is so sensitive to the position where the fork sits when you're setting pressure. We all know the Lyrik sits a bit into its travel. How far it is sitting in its travel at the moment you check it alters the reading. We don't know which position the air pressure guide is calibrated against. We don't know that the air pressure guide is accurate. It is just a guide. However it would be nice to know if it is likely to be a low limit, upper limit or mid value for a range to explore.
What works for me (170mm Lyrik, one token) is a fully extended (i.e. pulling out the fork to rest on its top out stop) pressure of ~83psi (Shockwiz) or 78.5psi (digital pump). If the Lyrik is allowed to settle under the eMTB's weight, this number goes higher - maybe ~90psi. In this instance, the air guide is close for factory spec of tokens but we still have a 4-5psi range on whether we believe shockwiz or a pump. The numbers I've given are probably as low as I'd want to go.
4. The air pressure guide gives exactly the same pressure advice for the 180 fork and the 170 fork. I'd have expected some variance.