CE / Amber Book Systems Material

Hi! I am studying for the CE Exam and was referencing Amber Books by test matrix - where it shows the Systems material as secondary. I was wondering if anyone had any recommendations on which of the System sections on Amber Book would be most helpful for the CE exam. I'm not sure if I have time to go through all of the sections before my test and wanted to at least hit a few of them before test day! The sections are: Thermal, HVAC, Plumbing, Electricity, Acoustics, & Lighting.

Thanks!!