"Servants of the Empire" - Book cover design

This is what a business in Australia was looking for in their graphic design

Background:
I have written a historical novel set in the Shanghai International Settlement in the 1920's and 1930's. My working title is 'Servants of the Empire'. The story is primarily set in Shanghai with a young Irishman as the main character. There is a back story set during the Irish War of Independence.

A Hollywood movie style pitch for this story might say
'Shanghai Triad' meets 'Michael Collins' or
'The White Countess' meets 'The wind that shakes the barley'

Here is the back cover promotional blurb I have written for the novel. Both the novel title and the cover design should simply, memorably and colourfully capture the vibe of this story:

"Logline - Love won and lost as civilisation dies

Shanghai 1927 - a city surrounded by warlord armies and run by gangsters. The wealthy international elite, sip cocktails in hotel bars, watching, amused, as armies wage war a street away. While they enjoy the cabarets, jazz clubs and taxi dance… Read more