As per me, it is highly recommended to have NTP/Time sync configured properly to avoid any issues. I usually do not configure NTP and never faced any issue, however, all my deployments were test/Dev (Most of the time, my deployments were embedded as well, everything on one machine). If it is production, it is must to have NTP settings configured.
DRS rules configuration can be your own choice. (Either VM host affinity or anti affinity.)
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Thanks & Regards
Vikas, VCP70, MCTS on AD, SCJP6.0, VCF, vSphere with Tanzu specialist.
https://vThinkBeyondVM.com/about
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Disclaimer: Any views or opinions expressed here are strictly my own. I am solely responsible for all content published here. Content published here is not read, reviewed or approved in advance by VMware and does not necessarily represent or reflect the views or opinions of VMware.