Yeah good take down.
You can do a similar strategy with a Battlemage, as long as you are deep in the Barrier spec and have the Fade Step plus BM invulnerability move. Basically, you use Fade Step to close with the dragon (or get in his ass) and pop invulnerability any time you think he is going to do a knockdown. Spam blade the entire time and manually refresh the barrier whenever the auto near death cooldown is not up. It takes forever, compared to a Barrel Rolling Reaver, but the strategy is essentially the same. I dropped the pussy Western Approach dragon that way (had wrong guys with me and triggered fight and they wiped out), but I screwed up the timing the one time I tried it solo on the Storm Coast dragon.
TLDR Version, Awesome Video and Battlemages are EZmode.