Which Itinerary will Maximise QFF Lifetime Credits?

I’m planning to travel to a few countries in Europe in August of 2017. After requesting some quotes, I was offered the following 3 options.

Sydney to Prague, then Copenhagen to Sydney

  1. British Airways – via London
  2. Emirates (Qantas codeshare) – via Dubai
  3. Cathay Pacific and Finnair – via Hong Kong and Helsinki

I am currently a Lifetime Silver QFF and I have less than 3000 lifetime credits to accumulate before reaching Lifetime Gold.

Which one of the 3 options will give me the most lifetime credits? I’ll be booking economy travel for the round trip although I don’t know what cabin class my travel agent will book.

Thanks for whatever light you can shed to help me decide on the itinerary.

You can use this to work out status credits  https://www.qantas.com/fflyer/do/dyns/initialPointsEarned