Pretty sure you've overestimated some of the weights and/or made typos. For example, a beanie won't weigh 10 oz. 2 mini Bics are only 1 oz total. Your FAK and essentials total seems high as well.
I also have an Exos 58 and like it a lot, even though my current gear is lost in it and I wish I'd bought the 46 instead. Not much weight savings with the smaller pack, though. You can ditch the lid and save ~5 oz. Strip off the ice ax toggles (reversible) and trim some straps for a couple ounces more. If you're going to carry 28-30# I think you'll be glad to have a fully framed pack.
If the Kindle really weighs 12 oz I'd nix it.
Get accurate weights on some things, drop pack cover and heavy water containers (as mentioned by other poster) and you should be able to drop below 10# base, even with the Exos.