Hi all,
Sorry, this is my first post here. not sure if there is any particular protocol to watch before jumping in, but here are my thoughts....
I really like mana points versus prepared spells. if a cleric comes across a blind man and says "oh great ($DIETY), please heal this man!", the answer shouldn't be "you didn't memorize that spell today."
You'll have to pardon the unorganized blurb below, but here are some ideas I'd love to get some input back on.
Spell Mastery feats - take the feat, choose a spell. the cost of that spell gets reduced a small amount. While I pretty much loathe 4E, I didn't mind the idea that spellcasters could always manage something if they needed it. I know that Pathfinder has cantrips at will, but those are very limited. With a feat like this, you could drive the cost of a 1st level spell down to 0 and cast it at will. There would have to be some conditions, such as no spell with a 'permanent' duration (to stop free cure light wounds). I wouldn't mind allowing people to take this feat more than one time on the same spell if they wanted to really focus. But a level limit is likely necessary, before a high-level wizard takes the feat multiple times and gets 'fireball' down to 0 points. I don't think that 'magic missile' at will would be as much of a game-breaker.
I also like the idea (mentioned before) of spellcasters sacrificing their health for casting. its a pretty common theme in fantasy stories. either sacrifice HP or maybe constitution to gain some extra MP. I like the condition track from star wars saga rules, it would work pretty well with this idea.
and lastly, I think divine casters should be limited in most of these scenarios. being able to cast any of 40+ 1st level spells is powerful and would slow play down. It would be something of a pain to setup, but I like the idea of certain gods providing certain spell-lists. if you worship a sun god, your list has light, healing, and protection spells. if you worship a war god, you'd get healing, harming, protection, etc. this is really just a flight of fancy. I fully realize any of these rules would break 3.5 compatibility really quickly.