i just noticed that is low levels, that you mainly had 1 heal spell. all ya had to do was click a tgt 1 time using healbot, and then dps with the rest of the group. the last 2 instances i ran, i was 2nd in dps and done all the heals. even had a ton of over heals. it seems like a good idea for a class, but at current time it is really over powered when compared to other classes.
currently, disc priest is just as OP at lower levels. One should expect the brand new class to be a little extra shiny at the beginning. At some point, they will get nerfed... or just not buffed when everyone else gets buffed.