This hobby is called punting for a reason: No matter how hard you research, how carefully you screen the WGs, you never really know until the WG opens the door and invites you in.
One alternative is to stop using AW and try using google to find escorts who have their own website (though a lot of them have AW profiles anyway - but not all). You might find what you are looking for on some of those individual sites. However, the prices tend to be higher than on AW.
As for escort agencies - look at the punting wiki. There is a page on escort sites with some general guidance on which are the better ones.