Wasn't talking heavier as in heavier gear necessarily, just in more of it. Although some of it is heavier like a thicker puff jacket. For the same grade fill thicker is going to be heavier.
On a day climb with a 3 person team you could take one light bag, especially if one person is stronger than the others, but it might be considered optional.
Go-lite makes a pack in the 75 liter range that weighs less than 2 pounds but you have to get used to the light suspension. On a day climb like this you shouldn't need a pack that big though.
Most of the light alpine axes don't work that well on a big hard ice face. You need weight to get easier sticks. Sharp as in recently sharpened. Function as in does it work on waterfall ice. Aluminum axes pons are def out in winter on something this size/magnitude, and probably questionable even in summer.