This is why arguing with your siblings is not productive
For TDC, the penultimate boss in BWD turned out to be Chimaeron. For some reason, we jumped immediately to Atramedes after Magmaw/Tron, ending up with Chimaeron and Maloriak as afterthoughts in our progression plan (it seems we like to take the difficult path...). After less than an hour facing off against Chimaeron, it's clear we could have boosted our boss kill numbers earlier had we chosen a different sequence of bosses.
Chimaeron is a fun fight that centers around a raid healing team being on their game. The encounter starts with freeing Finkle from yet another misadventure (damn gnomes) by activating his Bile-O-Tron, which causes Chimaeron to aggro. The first phase focuses on the healing team keeping the raid above 10k HP, which is the amount of damage inflicted periodically by Caustic Slime and Massacre. Eventually the Bile-O-Tron drops offline for a period of time when Chimaeron starts arguing amongst it's three heads, which is very healing intensive and requires the raid to collapse together. Once the 'bot is back on line, the team can spread out and go back to managing the encounter. The real fun starts at 20%...
Once Chimaeron reaches 20% HP, he becomes untauntable, and the raid becomes unhealable. This means everyone goes balls to the wall on dps, and uses aggro dumps and kiting kung-fu to dish out as much damage as they can before they die. Even the healers get in on the fun, wanding the old hydra for all they're worth. It's a chaotic end to a fun fight, and one that proved little challenge to the TDC team.
Only Nefarian remains allive in BWD. We think it's time to change that.