Advise on my CISA exam preparation

Hi,

I have passed the CIA last year and now working in Internal Audit including some IT audit works for 9 yrs.

Now, I am preparing for CISA and I have Hemang Doshi´s Study Guide 3rd Edition. I am considering to have QAE of ISACA as addition. Here, may I know is the CISA review manual of ISACA necessarily required to pass the exams? I heard some reviews from other that it is so dry to finish all contents in review manual. Also, It is so expensive for me to have all of those materials..

If you have same experiences, pls share them with me..

(1) Shall I go with Hemang study guide and QAE

(2) Shall I have CISA review manual as addition?