At 18 pounds estimated base weight, this is light weight. You do need actual weights of the actual things you take, not just the things on the list. Where you camp a bivy should do and I'd use a cannister stove. Your outer layer is too heavy - get el cheapo nonbreathable rain pants and jacket, they are warmer worn over insulation than expensive breathable shells. But you need to put this together and weigh it and read the suggested gear lists. You do not need to be fancy nor expensive to be light, just leave out the heavy stuff.
These are my own opinions based on wisdom earned through many wrong decisions. Your mileage may vary.