Sorting a matrix visual by 2 columns/measures - creating a rank with 2 measures

I have a matrix visual in a client reporting, where I am showing the revenue by client and across the countries where the client had spent. 

I would like to sort this, so that the client which has spent in many countries is at the top, decsending by total spend value.

I have a created a measure which provides me with the info in how many countries the client had spend and I also have the total revenue. 

However, I had not been able to create a ranking measure, which combines these 2 info and sorts the info accordingly.

Here is screen shot of my matrix visual - the client 577 should be listed at the top, followed by the client 263 and then client 447.

I have a test file created, but I cannot see the upload icon to attach it to the post ??

Any support the community can provide, is greatly appreciated.

Thanks, Manfred