Still can't get together 10 people who can avoid flame walls (quite possibly the simplest thing to do in any raid I've ever done) so 25 people to clear naxx without dying is out of my reach. Which is fine really, despite being my guild's achievement junkie this is something that I don't really have an interest in; way way too much effort required.
We've had a couple of situations in which on Patchwerk he has randomly killed a melee DPS mid fight. Is his hateful strike actually based on threat, or is it based on health? (Should the melee run into the slime to reduce their health?)
Tuesday night we had what I believe is just bad RNG luck on Kel.
Void zone on melee, as they were moving out KT did his MC. One of the rogues was MC'd. He instantly blinded another melee, who took a few steps right back into the void zone and died.
The only thing I can think of that would have been reasonably possible was for a holy priest with insanely fast reactions to GS the melee, but there's only a 1-2 second window there to notice what happened and get it off.