I think there's quite a lot worth discussing regarding brutallus strategy. While most guilds are killing him with 2/8, I personally think 3/7 is a much more stable lineup. With 3 tanks you can guarantee that no tank is taking a stomp. Also the meteor slash soak groups are easier to heal.
Our kill was done with 2/7 using a war/pally for tanking. The war provided com/imp demo/imp tc. I found (anecdotally) that the pally was quite an effective tank due to the nature/speed of Brutallus' melee attacks. Fairly frequently the pally gets to leverage Ardent Defender. Maybe a druid is more ideal because of the higher armor, but a pally is definitely workable.
My feedback with using 7 healers is you're much much more exposed to the RNG and tank-gib is a real issue. If you have the dps to do it with 8, or the 3 tank strat, you should take advantage of that because it'll shorten the learning curve.
Once we raise our raid's dps numbers a little, I'll probably switch in a 3rd tank and totally remove the RNG from the equation completely.
One (minor) strat we used was to have the tank not currently getting hit swap to
[Nightfall]. For a fight where most guilds are coming down to the line and getting the kill 10-15sec *after* the enrage, I think using the retro weapon in the tank downtime contributes quite significantly to raid dps. I put this in the same minor optimization bucket as having your druid tank dps during his breaks - but even the little gains matter in this fight. It's certainly better than a tank-geared warrior dual wielding.