One of the most important items that was mandatory for all big events in XI (e.g. Dynamis) was the Reraise neck or head piece.

I think this would work well in XIV, since you can't re-equip the gear during combat, so re-applying the buff is extremely difficult until combat is over. The utility of it is invaluable.

The other thing I'd like to see is a fairly expensive craftable one shot, unique battle raise consumable similar to Phoenix Down. IDK call it Phoenix Fleece?

Meds that actually work for end game content would be nice, too. I'm looking at you, antidotes, spine drops and eye drops. Perhaps something that clears all status effects from your character (including buffs), with a long-ish cooldown (thinking 5m).