Obviously for us to do a proper pack audit, we need to know what was in your pack. But anyway, here are some general considerations that haven't been mentioned already:
Try to share shit with your group members. Does EVERYONE in the group need their own sunscreen, knife, 1st aid kit, lipbalm, porno mag, copy of FOTH, compass, big camera, altimeter, etc, etc? Does everyone need their own 8oz block of chese, 16oz horsecock, bottle of Dom, etc? Probably not.
In the specific case of the dog routes on Rainier, there are so many freakin' people on those routes you can get away with leaving a lot of shit behind.
The best places to save weight/size are tent, sleeping bag, pot/stove, backpack, & sleeping pad. Compare your stuff to the cutting edge equip in terms of size and weight and make some changes.
Go to Jim Nelson's shop, give him your credit card, and you will be healed! HAILELUJIAH!!!