frustration very understandable and you are right that we need to step our game up. I saw the symbiosis to pally in the threads too, and saw the advantages. unfortunately only goes for resto druids. in current set up we would gain rebirth (Super) and consecrate (me).
Your strats have never let us down before Fuggs and I see no reason why they will now. While we didn't progress, we did all get to see the fight and can hopefully see the need for interupts/dispells/purges etc. I am happy to step up on this and work with what you have given us.
For that fight i think the extra poison dispell from Weizen will be essential. Potentially leave chunky as tank and i go dps to keep rallying cry up.
Either option i think gains us an advantage on door 2 but may cost us dps (from gette) on all other doors.
The following is your strat with some tweaks from research in the wee hours. All have 1 tank and 1 heals looking after Horridon.
Door 1 - Interupt target: bassilisk. Burn target: all big adds (none seem to bad), Dispell/Purge/Get it off me: Anyone who can, Chu mass dispell, Group stance: Broad stack on Shalim;
Door 2: Interupt target: Priest/adds (aoe interupts appreciated). Burn target: Priests!!!! (all dps, to the point of single target), Dispell/Purge/Get it off me: Super (hopefully under control with interupts) Group stance: Broad stack on Shalim;
Door 3: Interupt target: Nil (I think), traps on little adds, Burn target: Warrior and little adds (melee only on big adds, range on little & Big), Dispell/Purge/Get it off me: Super, Anyone who can; Group stance: Spread towards Door 4 (Hunters to MD all big adds to tank)
Door 4: Interupt target: Shamans. Burn target: Bears, Dispell/Purge/Get it off me: Chu mass dispell, Group stance: Broad stack on Shalim;
There is one more option we could try whihc is fixed tank targets. THis idea has some hair on it to say the least and requires Super to bubble the Horridon tank and then the tank to go nuts on threat generation again. Not ideal but possible.
The vids I watched all show the same rough idea of it being a very messy fight. For our progress on doors I will fall back to 1 door at a time progress.