GMAT Strategy

Hi All,

I am planning to retake GMAT after an year. Last time I exahusted 5 MGMAT tests, 2 Kaplan and 2 GMATPrep. My last GMAT score was 680.

I am planning GMAT again in a week and so far have taken MGMAT (3) and Kaplan again (3). Most of my scores have been in late 600, early 700. There were some repeat question in Kaplan/MGMAT. For most of repeat questions, I was not able to remember answers.

Which CATs can I additinally take? I remember that in GMATPrep tests last year there was some overlap with OG. If I install GMATPrep again will there be an overlap with OG or last year GMATPrep. I will really appreciate if I can get an advice on reliable CATs for retakers.

Thanks