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.