I did heroic Stonecore yesterday, and apparently it's one of the most complained about instances. Not the *hardest* (allegedly heroic BRC, haven't tried it) but most complaints, and I can see why. Every boss is a skillcheck.
If you get in the worm's jump or let the shardlings reach you and blow up, you die. If you get hit by the drake's rocks, stand in fire, or don't LoS his Shard Storm with those rocks you die. The rock guy paralyzes before he shatters (breaks on damage, kills you if not broken) so the ranged need to reflect a dot off him and the melee need to hit him for a dot and then run away from the shatter, and in addition the tank needs to dodge the ground smash cone attack or --you guessed it-- they die. The last boss *can* be done with standard tactics but apparently the gravity wells can also be used to kill adds and block rocks.
It is SO much fun!
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Beohrn -- 85 druid
Brandmanen -- 85 Hunter
"Skill is a measure of how fast a player can turn experience into competence." -- Anedris, EJ forums
"The warrior acts, the fool reacts"
Please pardon the ego, it keeps getting stuck in doorways. I'm working on it.