I do enjoy doing this in FFXI, but that isn't possible to do in XIV as in XI you aren't shoehorned into a formation when entering instances so you can enter as a party, zone in, break party form up separate parties summoning your own trust line ups (in XI they are basically Spirit Ashes from Elden Ring/ NPC co op summon signs from those line of games [but pre-dating Spirit Ashes and I imagine developed in parallel with FROM's games but my comparison isn't to imply SE or FROM ripped each other off but rather they functionally act in a similar way as opposed to how XIV's iteration functions]) and forming an alliance inside the instance and proceed to bully bosses. I always hated how content design in XIV means you need to have the requisite number of people (prior to undersized/content being allowed to be undersized) when I enjoyed XI's approach of "if you can somehow pull this off with less people have at it but GL"

Do wish I could summon my recruited NPCs from my barracks and just kill time with them in FATEs or w/e (assuming such functionality comes with XI's built in commands to toggle display of other payer's NPCs on and off as well as the command that allows them to remain on screen but otherwise ignored when you're trying to target mid combat).