I'd define scaling well in this context more like physick cast with 1/2 the mnd of a healer instead of like 1/7 that casters have now. So like in a level 60 context a heal that does 2000. It'd be weak, but a lot more functional than Physick is now for casters. I really wouldn't hope for anything much stronger than that for a dps. It could be native, but its also just a good opportunity to fix cross classed Cure/Physick, because they're getting worse as max hp increase.