I’ve got Crests on the HT and Flows on the FS.
Considerably heavier than you at 14st, and not riding remotely “light”.
I’ve battered the hell out of the Flows for two years and they have not gone out of shape at all. A few broken spokes and some minor truing but thta’s all.
I’ve only had the Crests for about six months and maybe they don’t receive the same agro, due to only being on an XC bike, but I’ve still the same weight and clumbsy style. They work well for me with thin tyres. 2.0 MudX on at the moment.
From what you describe, I’m sure Crests would be man enough, but I’d rather be on my Flows if I was rattling down Cavedale or Parkin Clough (to use examples local to you)