Thanks in part to Craig McCormick’s Shanghai Skyline video I now have a version of this photograph that I’m satisfied with.
In my previous attempt, the colours were just too cold (my fault) and my (over)processing attempts left the sky muddy and blotchy. The sensor on my Lumix GF6 already has difficulty with large expanses of blue making it very susceptible to processing artefacts.
Craig’s approach has allowed me to achieve a the desired result cleanly and without loss of IQ.
Craig’s Tutorial: http://youtu.be/1rNFIzbVzD4