doesn't surprise me. i honestly spent close to six hours a day those three days going for mine. the book i sent you wasn't from farming like that, but casual rare killing trying to get keys and vp over roughly two weeks. rare killing isn't quite as lucrative as it was when the patch hit. there were roaming bands of 10 - 20 horde and ally killing them, so they went down quick. now you're lucky if you get one or two people killing them with you, so it's usually you against a 7-10m health monster.
when i finally got it, then spent an hour on the boss. got tired of throwing my head against a brick, so i quit trying cause at that point i had one day left on my account and wasn't gonna spend it being pissed off at it. went back to try to kill him again a day or two ago cause i was bored, but i could barely get the fucker to the first fel pup stage through all the shaking i was doing. food in the house again, so i'll try again soon. fight is 95% mechanics, and one fuck up is a wipe.
yeah, that place is fun. annoying as shit if you fuck up and aggro things, though. i explicitly get keys on my priest, lock, and monk every week. that place is a lot bigger than you think, though. since elder charms are all but useless to my priest (lock needs trinkets bad and monk is still rocking blues), i use her to try and get further in that the other two. i can buy more of the help items to progress further. plus a good run will net me every coin i spend back, anyway.