The Unique Mob/Rare item system is one of the most worthless frustrating piece of crap systems ever designed by ANY game company EVER! Rare drop items that drop 1 in 40 every 18 hours by named mobs. What genious thought of that system?
Yeah, we'll make customers stick around by making 10 of them get an item they want this year. If they're not in a huge guild, they won't ever even see the Uniques that have them because they won't know the timers. Perfect!
High level content gets to be enjoyed by about a dozen people a month. Most of whom don't even need the items, they just want every item in the game for the sake of collecting them. That or making money on Ebay off of the ridiculous rarity.
edit: anger makes for spelling errors..