brehobit said:I want to second the idea that in a weak magic game (including items) a cleric X/Fighter X will be very powerful indeed. Same a few other combinations. Spells become the only realistic way to beat DR/magic until a pretty high-level.
In such a world I'd likely go with the Cleric/Fighter or perhaps Cleric/Paladin depending on how that would be treated.
Issues:
#1 Cost of magic items. Are you going to bump up the _costs_ (in gold or XP) to make items? Are you going to change the expected wealth? I think you have to cut money down considerably if you don't want everyone to have tons of minor magic items. Not sure how much, but I'd consider multiplying costs for items by the minimum caster level. So potions of CLW aren't any more expensive, but CMW would be twice as much. A +1 sword has a minimum of level 5 to be able to make (that's when you can take the feat right?) so it goes to 10,000. This would make very minor items _very_ common, so maybe just have a multiplier of (1+1/2 caster level) or perhaps (2+1/2 caster level). Charge that for item creation too. Really depends on the flavor you want.
#2 Monsters and CR. This is going to go out the window and you'll have to reevaluate every CR. Also caster level for monsters.
#3 Feats that improve effective caster level (max HD). Allowed? I'd probably go with yes.
Just some thoughts. Let us know how it goes, this might be the solution to how to do this in my (main) world. I've been looking at much more complex solutions, but this might work...
Mark
Cleric/paladins can work as long as you limit prestige classes that allow you to go up in spellcasting levels for both each level. We had a player doing this with cleric/paladin and it was really powerful to powerful for our low magic game.