First, I need to clarify that I've never played a priest.
We have a disc priest on our group and he says that doesn't like to dps while he heal, currently we're progressing on H Iron Qon and probably can use a little bit more dps on first and last phase to reduce the fire damage, not asking for a lot of dps, probably 50k dps will be enough.
The question is, Is (very? moderately?) hard to dps while healing as disc? Will his healing be affected if he dps and heal? Is better for him to go holy if he doesn't want to dps?
Sorry for my english and thanks in advance.