I’ve run countless UST tyres in the Alps for years. Like others said it depends what you’re doing as there will always be a compromise.
For uplifts then the old ST HR 2.4 and Minion rear is a solid combo. The Fat Albert 2.4’s should be ok for both up and down, jack of all trades, master of none.
The worst tyre for me was the 2.4 (balloon) RQ’s, very fragile sidewalls and my mate had his ripped open. Inspected mine at the end of the week and found I’d been living on borrowed time with them. Several tears that were down to one last thin layer.
Bonty’s are good too.