I don't expect materials would fare too well should the China slow down becomes significant and / prolonged.
Even If I were allowed to provide advice I don't really have much, let alone anything that could be tailored to anyone's circumstances.
I have mooted companies with good management. something new and different to offer and global revenue sources BUT everything gets hit in the event of a major crash. Everything.
A flash crash scenario is only one possibility. A slowly tightening credit squeeze can be slower, far more difficult to avoid and more devastating that a flash crash. There are no certainties for the AUD either. The one thing going for the AUD is that it isn't the USD, the Euro, the Yen or the Yuan.