Hi, you can solo heal this on zealot or shaman too, but it wouldn't be much of a speed run as they don't deal damage.
To reply to your earlier complaint, I honestly don't think shield dok is viable in most pvp settings, so nerfing it would defeat the purpose of it existing.
Additionally, it only works if you have a good group. If I would do BS with randoms I would just go heal spec, as you need to rely on your tanks and dps to manage aggro. Like was mentioned, try solo healing this yourself and see if you still think it should be nerfed!