PSU 206 for HFM 18.104.22.168 came out on Nov 27, 2017. There are no new notable features included in this patch, but there are a whopping 53 defects and enhancements. They run the gamut from journals to task audit to security to infrastructure to IC matching to data grids to everything. There are three framework patches required along with 206 and a FDMEE PSE, so don't forget those. Also, FDMEE and Financial Reporting haven't been patched lately, but if those PSUs aren't up-to-date then now is a good time.