Dragon is a sequence animation comprising of both the spellcasting (SC) animation and the kicking (KK) animation. Unfortunately, it can't be sped up with either BoS, IAS, lower WSM weapons or faster cast rate gear. I've seen it widely reported that faster cast rate gear will speed up the spellcasting portion of the animation. My testing indicates that FCR has no effect on Dragon Flight. Sorry. I used and editor to create some ungodly IAS and FCR gear. With these items, I had over 200% of both IAS and FCR. I also used BoS for these tests. The results? It didn't matter what amounts of IAS, BoS, and FCR I had, the Dragon Flight animation stayed at the same length.
Dragon Flight has a set speed of 23 frames. That's it, no EIAS or BoS/IAS tables needed. Wish all the attacks were this easy to cover.