Sorry. I intended to make it clear that I want to talk about multiclass spellcasters in terms of how useful they are to the party, not how powerful they are in combat. We disagree on whether they are as useful, but not on the importance of that distinction.
Ok, it looks like people agree with me that multiclass spellcasters are too weak: http://enworld.cyberstreet.com/showthread.php?s=&threadid=54802
So the question now: should the system be fixed at some undetermined point in the future to make multiclassed spellcasters as useful as other characters?
That's pretty much exactly what I'm saying. I'd probably make players buy a row off their spells/level chart, and then spend extra points on anything below the highest level, for the sake of 'triangularity'. Or do the simplified method with a chart assigning effective level, probably using...
No comments? Sigh. I guess that what I get for posting it on a weekend.
On second thought, I'd be inclined to simplify this system a bit, and just make up a big chart to get effective spellcaster level from class level and character level.
I'm still not sure what you'd want to do about...
Well, no, it's not quite that bad, you'd still have to be able to cast a 13th level spell for the quickened 9th. But there's still plenty of room for abusive things in levels 5-8.
I think I liked your original suggestion better. I'd just use half-slots, it's not that much more bookkeeping.
Using a slot of the metamagic level works fine for low levels, but once you start being able to cast higher level spells I'd imagine it stops working so well. Once you can cast 7th...
Question: Level 9 wizard, cone of cold vs. empowered fireball. Are you comfortable with having two L3 slots do more damage than you can do with the L5 slot? Or should metmagic also work the old way?
Maximized Cone of Cold: does it cost 2.5 slots or 3? What about the maximized, enlarged Cone...
The stuff about the mystic theurge brings this up, and we mostly agree it's a problem that multiclass spellcasters are too weak.
So I had the thought: as far as I see it, the problem is that higher level spellcasters get more spell levels per character level than lower level spellcasters...
Re: Humanity & power attack
I can bust out the math if you'd like, though I'd feel kinda funny about it in a thread about barbarians. But basically, when your chance of hitting (out of 20) is greater than your average damage, you're better off power attacking. So it's actually not so useful...