Look at it this way - no one site that offers advice is going to be “100% right, 100% of the time”. Sites like AMR basically aren’t saying ‘you MUST do this’, they’re saying (well; AMR does), "the system we use is based on xxx no of simulated ‘fights’ & our conclusions suggest that (insert stat. weightings) is the way to go’.
Easiest way to play it is look at what’s offered & have at look at what the basis for the conclusions is based on… the easier it is to see the ‘why we recommend X’, the more reliable I would say that the recommendations are to use.