Andre said:
But notice that the examples you give of effective multiclassing use classes that are, for the most part, linear (using Mokona's definition of the term). Right now, 2 Ftr-10's are pretty equal to 1 Ftr-20. There are situations where the Ftr20 would be superior, others where 2 Ftr10's would be, but for the most part, there's not a lot of difference there. Same with Barbarians, Rangers, even Rogues (who get some pretty good abilities beginning at level 10).
Actually, I don't think that two Fighter 10s are anywhere near the league of a Fighter 20, and said so in my post. I also used one dedicated spellcasting example - a Cleric/Fighter - and pointed out that everything about the way the Wizard and Sorcerer classes are built aggressively discourages multiclassing. To those two I would add the Bard, but for a different reason. Bards already get some of basically every set of skills available in D&D, and so there's no reason to multiclass; you simply use feats, skills, spell selection, stat assignment, and the way you play the character to emphasize one of the many possibilities.
But spellcasting classes are the least linear - they have huge jumps in power every other level (when they get a new level of spells). Two Wiz10's are nowhere close in power to one Wiz20. Hence, they have the most difficulty multiclassing. Gaining the abilities of a level or two of a base class in no way compensates for the loss of abilities from higher levels in their spellcasting class.
Again, I disagree. If your approach to everything is to cast a spell at it, then yeah, you should be a single-classed wizard. But if you want a character who uses skills synergistically with spells, then you're good to multiclass. The weakness problem remains, because the wizard class really hates being diluted, and so feats and PrCs like the ones I mentioned are important. However, note that mixing say Rogue in with Druid, or Barbarian in with Cleric doesn't necessarily weaken the character. It forces you to focus in certain ways to utilize your abilities, of course, but a character that multiclasses and doesn't do that is just poorly-built to begin with, since multiclassing is all about utlizing a wider set of abilities as nearly simultaneously as possible.
Thus the two issues do relate: multiclassing "synergizes" well with classes that are similar, lacking significant jumps in power from one level to the next. Your Ftr10/Clr10 matches up well against a Ftr20, but is clearly underpowered compared to a Clr20. Multiclassing fails miserably in classes that increase in power exponentially. Which is what this thread is all about - are the power progressions in D&D too steep? YMMV, but I still think they are, at least in the spellcasting classes.
Well, I think a Fighter 10/Cleric 10 would do just fine against a Cleric 20 if built to emphasize both sides of his strengths. Of course, in that particular case it's probably unbalanced toward the Cleric side because Cleric is somewhat broken vis-a-vis the Fighter class. This isn't really a problem with linear or non-linear progression, though, it's just a recognized fact that Fighters at high levels are weaker than Clerics at those levels. Maybe your problem is that D&D isn't
consistently nonlinear?
But all that aside, I never said they weren't related, just that they were conceptually distinct. There could very well be fixes that affect both, but I think the game already offers solutions to the multiclassing problem that work while leaving D&D's power progression curve intact. The poster I was responding to seemed to conflate the issues, and I don't think that's right.