Hi,
tried Thorim (Ulduar 10) 56 times Hell, i have never seen such a bugged crap in any videogame ever. It´s soooo pathetic by Blizzard, to call it "all old raids are soloable" and on the other side, they are not capable since near 5 years, to fix that crap. I tried it as a hunter (560), by the way. Not tested the other classes.
I invested 2 hours of videos, guides, forum-threads, tips, tricks, bug-using and so on. That boss resets from time to time without any logical reason, here and there and everywhere. Sometimes something is attackable, sometimes not. Sometimes all mobs despawn. Sometimes the blue killer ball zaps around the corner and kill you, despite of the fact, that i was 20m away (and the other times it will work normally). I also had 2 times, after each other, the second part, when the collosus is already down, AFTER a reset of the arena ! My result is, that i think it is impossible (at least as hunter, it seams to me) to kill that holy bugged crap.
I do a lot of achievements the last 2 months. Killed Halion 25HC solo (it´s on YouTube). Get into 8/8 with "You are doing it wrong" with that hunter (died on last mob that fly around and hit hard - btw it´s a awesome achievement in my opinion). And so on. But such a pain, as Thorim, i had never seen before.
As a side note, i got the achievement for "Sif", with a dwarf i take there. Not one of the Arena adds ! A dwarf. Seams like a bug in the bugs bugged that achievement to me But the downside is, i can not get the achievements from Yogg Saron. And it´s also a shame by Blizzard, that they are not able to open the Yagg Saron door, without prerequisites of the 4.
@Blizzard: Shame on you ! Your Company had became a money-melk-machine and it´s a shame for your own past, and the company you was in that time. Your impressive lack of quality is filled with new shiny in-store-mounts. Meeeeh. Can´t believe it. Go to hell and sleep well.
So, if someone had a mystical secret how to do it as a hunter, tell me.
Greets
(sorry for the bad english. i am not a native american and my english is really really not good at all, as you can see ^^)