Here the 1660 station is about 10 km @ 10 Kw daytime 1 Kw night time and the 1560 is about 5 km @ 5 Kw daytime and 1 Kw nighttime. I have another one with 4 phased towers about 2 1/2 km at 990. Not sure about the power yet, but the Flamingo knocks them down well below the two others. I am still running the Kiwi without any pre amp as I think it is better to solve the overloads first.
Yup them EU stations have a much tougher situation on 40 m. I still remember the racket when I lived in SM land prior to 1978 (I got my licence there in 1964). If I recall it right it was Radio Peking all over the place. Those were also the years of the Russian Woodpecker that was even worse QRM.