So the consensus is that melee (other than [eg]incontrol feinting rogues) are pretty awful, mostly owing to the P1 damage. Of that, most of the damage comes in the form of demolition. So much so that Midwinter mentioned they don't want to bring melee to this fight, and their DK complained about survivability. On the other hand... the Demolition ability doesn't do damage if it doesn't hit you. Again, the consensus is you're eventually going to get hit, but that's not technically true.
One thing I noticed in pulls on HC is that there's a huge variance in how hard it is avoid any damage from Demolition. Some pulls it seems impossible--you just take a ton of damage. Other pulls, I'd go into P2 with no more than 1 or 2 hits overall. The key factor was the spread of Demolition: when it spawned in a broad half-circle around the whole area you can safely DPS Blackhand, you're kind of screwed, and have to resort to triage to take the least damage, selectively taking demolitions to stand in as opposed to soaking a bunch at once.
It occurred to me this fight could be a lot easier for melee if melee could perfectly stack on each other when Demolitions go out, then sidestepping as new ones appear, but remaining mostly tight and stacked. The upside to this is when a bunch of demolitions spawn at once, they'd all spawn in the same spot rather than taking up a huge amount of real estate. The downside is if you do screw up, you're no longer taking some damage, but way too much, and should really just gquit from life.
Thoughts on approaching the fight like this? Has anyone tried this in a systematic way? Are mythic guilds already doing this and it just doesn't matter, the damage is still too much? I am actually just retarded?