From small to smaller, from high to higher, we assess the performance of the leaders on Campaign Trail 2023 – and discover it's all music to the ears of one leader-in-waiting National's Christopher Luxon sought to escape scathing criticism of his tax policy from Goldman Sachs, with a flight to remote Hokitika on the West Coast. He told local supporters his flight over the Alps from Christchurch was the best scenic flight in the world. “I sort of…