If it starts with a duration of 30s, you're wasting one BotD reset as it caps at 30s. Think about it this way, between HT and Chaos Thrust, we'll need to pop Internal Release, Blood for Blood, X-Pot, Blood of the Dragon, Battle Litany and most probably Power Surge. I already double stack IR + PS together after HT, and X-Pot needs its own weave-space as it's a long animation. That leaves me with Blood of the Dragon, Blood for Blood and Battle Litany to use within 2 GCDs. And if you're using Thendiels opener, you're also trying to fit a Leg Sweep in there.

I could see us pre-casting BotD so we can still double stack our other skills easier. BotD, by the looks of the videos shown, has a very long animation, so I wouldn't want to use it in between a GCD at all, unless you're burning it for a Geirskogul.