Last year's #LunarCon had a panel regarding the FFXIVxDnD5E project, discussing the idea of encounter design utilizing familiar game mechanics within #5e
And thinking about it now, I believe I should be reviewing that panel...
EDIT: After reviewing the panel, It was not in-fact SilentSoren who directed the panel, but none-the-less a good overview for some ideas you could use if attempting to adapt content into a game of 5e for ffxiv
I'd use it and start a thing, but my events are all resigned to the name LunarCon. Oh well.
(Side note...the inaugural #LunarCon takes place October 28th at Arcade Club Bury, if you fancy it)