DL no longer offers First Class on international flights. The premium cabin is called BusinessElite, which is half-first, half-business. No flat sleeper seats which is generally the norm nowadays in international F, but excellent recline and pitch, nevertheless.

As you do not have status, attempt to book 1 BusinessElite seat (80K to Europe), navigating outside the blackout dates. It certainly is easier than trying to find 2 premium seats on the same flights. Once you have that seat confirmed, use the double miles (160K) to guarantee a second seat on the exact same itinerary.