Queue Prioritization - How Does It Work?

[Risvertasashi]

So, unless you miraculously get a full party all directly queuing for that instance.

Really, there's a pretty decent chance this will happen in, for example, stormblood leveling dungeons... which can mean shorter queues for DPS. Queues are harsher for things like story trials (no reason to queue them more than once, so you rely on the roulette a lot more), or things like the 50/60 dungeon queue, which... once again, no one queues for individually and even the roulette is slow.

[Iscah]

Cape Westwind is going to have a very small "actual queue" because there's absolutely no reason to run it again once you've completed it. There aren't any prizes and you don't need to repeat it for later quests, like some of the primal trials.

the 50/60 dungeon queue, which... once again, no one queues for individually and even the roulette is slow.

I've queued them specifically sometimes. Some have really nice glamours (eg. the 'thief' gears from the Arboretum/Sirius Hard), and also at the moment I need stuff in that item level range for desynthesis.