Well, I'm thinking the best way is to just add a Heal check when you case a Cure, while performing percentile healing on a successful Heal check, as well as adding other conditions to Heal than just poison/disease. It means multiple things.
Firstly, the spells remain relevant at low levels, percentile healing screws over low level characters massively when they can't reliably obtain non-Cure based healing yet.
Secondly, it means Cures can remove conditions like poison or disease with a successful check. Niche, but it means several ultra specific spells no longer need to be prepared.
Thirdly, it avoids affecting offensive uses of Cures, even while improving their functionality.
Fourth, it makes the Heal skill more relevant. Sure you can do it all with the right miracles, but a GOOD HEALER is more than the spells(which any idiot with a wand could do)
So, you have the basic Cure X Wounds spells, largely unchanged, except for the addition of percentage-based healing at various Heal DCs? I think that would work very nicely, since it seems to integrate all the requirements in the thread so far.
Actually, I really like that idea. I will implement it in my next game and see how it goes.
What DC's would be fair for the varying percentages, do you think?
I ran some math and figured that Heal, with the most common skill boosts (healer's kit, ability score, ranks, perhaps one or two other minor factors) goes from about +8 around first level to about +42 at 20; this doesn't include competence magic items, the skill synergy that should perhaps be added, or other things, which would take it to at least +75. Anyway, starting at DC 15, this would suggest an ending DC of 50 or so; however, since some people are likely to use the other skill-boosters, this should probably be increased, perhaps to a DC of 75? If so, assuming 10%, 20%, 30%, 40%, 50%, 60%, 70%, and perhaps 80% boosts, that suggests a tidy +10 to the DC for every additional 10% (peaking at DC 85 for 80%).
I'm assuming people are not going to be dumping
guidance of the avatar or similar on these checks, of course. Anyone who dumps extra spell slots, bardic music, truenaming, or similar on healing deserves whatever bonus they can eke out.