is this a feasible way to get a Molniya orbit around Duna?

[BechMeister]

So - I am doing the Duna Mastery challnge. 1 of the steps ist to put 3 rellay statelites in orbit around Duna. I thought it would be obvious to try make a Molniya Orbit.

But I have had a hard time wrapping my head around how to make that most feasible. I think I came up with this theory:

1.  Send a satelite stack and put them into a circular orbit with 120° between them.
2. have them all burn to a ~60° inclination
3. Boost them into the elliptical path, one at the time.. Hoping it wont take to many orbits to get the right timing.

Is this a feasible way? or is there a better way?