Gear advice/suggestions on Light Ski-mountain pack

Hi,
So my pack is too heavy: ~5lb. It is the Osprey Aether 85L which will easily carry a small person in it. It is good on features, and I like the back venting but it is still too heavy. I would like something smaller :45-50L for 2-day summits, that is slightly more technical I've looked around and so far the Millet Prolight 45 seems decent. What packs do you have or could you (not) recommend?
Thanks,

That's a monster pack!

Take a look at the Arc'Teryx NoZone -- I'm pretty sure they're still making it. I've had mine for 9 years and absolutely love it. If you pack light, it's ample space for 2-3 day trips, but it'll carry heavier gear for winter multi-day trips as well, though it gets top-heavy. Skis and climbs well, also.

ID, you're talking heavy there! You should be able to do two-day trips with lots of gear with packs in the 30-40 L range and love life much more!!! I'm currently using an Osprey Variant 37 L which has been great lately for overnight trips and 3-4 day trips to huts. Lots of good packs out there in the 40-50 L range, but I'd recommend that you learn to leave the kitchen sink at home and enjoy skiing with a smaller pack.

$0.02, of course. Hopefully someone else will give you the good recommendations you sought instead of proselytizing.

I generally have to pack a little heavier than others because maintaining my temperature requires a bit more clothing. Also, If I were to get a pack that is that small, I would have to buy a new sleeping bag that is smaller than my current one, and a Jet boil to take instead of my Reactor, for everything to fit. I don't quite know how you would fit bivy+bag+clothing+food+additional gear in something that small... But like you said, learn to leave the kitchen sink at home which I've gotten down to leaving it but carrying the bathroom sink instead.

The NoZone seems still kind of heavy at ~4.5 lb? The Osprey Variant seems more like what I'm looking for in features and size. Maybe 3lb 9 oz for the 52L Variant but risk the further ridicule of Monsieur Sky?

There's no escaping my ridicule, myself included, so don't base your decision on that.

I ski with a Cilogear Worksack 60 for everything from quick tours to long jaunts. I've been lusting after the Cilogear 40 and 30 of late.

Endlessly configurable, and the handy straps have held skis, bindings, injuries, sleeping pads, etc. together. Lighter than lots of comparably sized packs, removable frame/sheet, sufficiently durable, nice crampon pocket.... I like it. Mine's at ~120 days or so, and has only recently started to age. Most of my gripes about my V2-3 pack have been fixed in subsequent versions.