I have created a custom post type that I want to order by 

 1. `custom-field-1`, which is boolean so its value is either `1` or `0`, in `DESC` order (1 to 0)
 2. `custom-field-2`, which contains text and is supposed to be ordered `ASC` (A to Z)

**First Question:** 

A more powerful ORDERBY-parameter was introduced in WordPress 4.0. Can this be made using the new ORDERBY functionality?

**If not, second Question:**

What's the best approach? How would I make a `meta_query` order the posts by `custom-field-1` in descending order and then by `custom-field-2` in ascending order? 

**Edit:** 

Or would it be an option to use two instances of `WP_Query`, one for the posts with `custom-field-1 value = '1`' and one for those with value `0` ?

I know this "order by multiple custom field values" has been discussed a lot here, but I did not find a similar question I could adapt when I was searching the site before.