Vanguard has taunts too, coupled with bigger numbers on HIB and insane burst. But i do feel assault vans are squishier than vigil knights.
And my sorc running a hybrid build (13/12/16) does comparable overall dmg while being able to dish out some decent healing, about 100k-150k each wz or more, if i focus on that.
I agree on the 1on1 part, its fun and we are certainly strong here(sure there are stronger solo classes but we do allright), especially in small battles.
I only solo pug, have never run a premade.