I already booked 4 segments in December last year (2 within Italy and 2 cross country FR-IT).
So I missed 2 international segments.
Thanks to ITA matrix I found that ATH-FCO-CDG (or BRU) was the cheapest with 2 cross countries segment in the same trip.
Cheap lightfare in R was 80€ all in.
I took both segments this morning and they already posted in the Millemiglia account.
Positioning flight to ATH was 100€ but I could do all in one night.
PS: I am making the assumption that the date the flight was booked and the OTA does not count (at my own risk).