Dungeons... following a raid format of gaming... yes they have these too, in equal or greater abundance. End game raids... WoW rift, wildstar etc... can have more bosses in a single raid encounter than 2 sets of FFXIV patches... but they usually release more than one raid at a time to work on progression.. a single WoW expansion offers roughly 12 bosses to tackle. They release expansions with a similar schedule... but honestly... a single WoW expansion is like HW + 3 content patches. Rift pumped out like 4 or 5 raids in rapid succession to keep up with their community.