I was on my Nomad with full DH High Rollers in Super Tacky.
I think I was definitely a little over-biked for the XC and even possibly for the DH too and my tyre choice was definitely wrong for the XC but they did mean I was almost certain to avoid punctures or pinch flats on the bits of the weekend I was likely to enjoy most.
The main problem was me though. I’m just not fit enough. I was not able to sprint the bottomhalf of the DH as I would have liked and I found the XC climbs very very hard going. Given me some motivation to work on my fitness though.
I think that, with the power of hindsight I would still use the Nomad (it is my only remotely suitable bike) but would go with much lighter tyres and maybe try going tubeless