Back when the game was still fresh in 2.0, I played SCH as my main - and actually used Arcanist in the low level dungeons as a healer - though at the time finding pre-mades to do this with was easy as everyone was at the content point I was to do it with. (Remember you can go with any combination with premade groups etc.) Though I also can say that this wasn't something everyone could do - since they had lower MND and their heals were meh compared to CNJ's own you have to heal harder... And one too many screwups came that much faster.