Depends on groups and situations. Healers don't have to be bad, for example when I did brayflox I was SMN and our heal was a SCH. At that level SCH can't remove ailments. So after a wipe at final boss we decided I would help healing to keep up with poisons ticks on the Tank. And it did work.

I paired in a macro Virus with Eye For an Eye so every 2 virus it is cast on tank.
Throwing a Physick now and then can help too.