Like I said, there is no one singular fix that would solve every problem.

But it would be a good fix to make Healers damage output comparable to Tanks, even if it is by just boosting potencies. And SE themselves have said they don't want to give Healers more attacks, so the only viable fix IS increasing potency on the one attack we have and the DoT.

If balance breaks the game, the game deserves to be broken.