MW has a version of a external that is different lol (life cocoon), just like evoker has time dilation, shammy has earth shield, disc has pain supp (I never played holy priest), hpally has sac, and rdruid has iron bark
They all act and fill a similar niche (external) but do so all in different ways and effectiveness. (shield, stagger, dmg reduction, redirection, ect) Similar and yet different… woah