CFAI Books vs. Schweser/Prep. Providers

Anyone have any suggestions as far as what readings CFAI books should definitely be used for and which ones you can get away with using Schweser, etc.? Seems like volume is almost 2:1. CFAI also seems to have way more formulas than are tested.

Read schweser notes… Then do qbanks and mocks… Questions that you dont understand, go to CFAI text and read it in more detail.

Thank you 125mph!