where - When and if to use "What are you at now?"?

I wonder if "What are you at now?" is correct grammatically to use, in this format and context.

Two concerns that I have:

Ending with "at"

• I am not ending the question with the "at". However, I am not sure adding a "now" at the end does help or not. Will this still be a valid question to ask? Is it valid to end a question with "at"?

Context

• I am using it to address a person's need to understand where they are standing with a problem. The closest that I could think of to ask was "Where are you now?". However, I think the "Where" question is more about the location and not the state of the person.

I know there is a very similar question asked at here. However, mine is different in a sense that there is now at the end.

Answer

ODO actually gives a relevant example, though it labels the usage informal:

be at informal

Be doing or trying to do.

‘what are you at there?’

But the definition is different, addressing an activity rather than a state. This is not used the same way as 'Where are you at now?' Compare the contrast between 'What are you doing now?' and 'How are you doing now?'