I am playing a gnome pyromaniac alchemist in a campaign and find the entire extract system takes up most of combat in addition to being pointless when I'm done cause I am out of them after one fight. I know the easy fix is use less but i don't like using my character to a minimum of its potential. Got the Secrets of the Alchemist book but it still leaves me angry most of my stuff lasts 5 rounds-5 min completely useless for combat heavy days.
I currently use a combination of Dex Mutagen, Reduce Self, and Shield. Occasionally i put fox's cunning in the mix. Don't get why no mage armor to me physical armor is useless.