So I'm going to les deux alpes in france in a week. I need to wax my skis before the trip but I'm not really sure what wax to use. I've had a look at the weather forecast and currently the temps are very cold (between -10 and -20 (Celsius)). It's supposed to warm up when I'm out but the temperature varies quite a bit between the base and higher up the mountain, seems to be generally betweem 0 and -15 during the day.
I have 2 waxes available to me. One rated at 15 to -8 and one -10 to -30 and I'm not sure which one to use. The other option is for me to order a universal all temp wax such as this one I found on amazon: https://www.amazon.co.uk/Datawax-DataWax-Universal-Ski-Wax/dp/B00AKYRUMW/ref=sr_1_5?keywords=ski+wax&qid=1638473577&sr=8-5.
However, I've heard that all temperature waxes aren't great for powder/ anything that isn't groomed. I've also heard that it's better to use a wax for cold weather in warmer weather than it is to use a wax for warmer weather in cold weather?
I have no idea how much truth there is to either of those claims hence why I'm asking here.
Which wax should I go for?
What happens if I use the -10 to -30 wax in warmer weather?
What happens if I use the 15 to -8 wax in colder weather?