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« on: April 02, 2012, 10:27:23 PM »
I don't know of anyone who thinks 3.5e's multiclassing system works very well, including myself. I wrote this up as a potential replacement for the system a while ago, but never really discussed it and eventually forgot about it. When a couple of threads here reminded me of it, I thought I'd put it up here to get some extra eyes on it.
Design Basis
The basic idea is to use CR math to point us at an appropriate setup for multiclassing. Since 2 creatures of CR X-2 are supposed to be equal in power to a creature of CR X, giving a character of level X the abilities of two different classes of level X-2 sounds like a good start. That character has left their primary class behind by 2 levels, and would gain substantial benefits to their secondary class as a result. We'll go with a much reduced ability set for people who just take a single level in a second class rather than go with the normal mixed pair levels, however, since it looks like too much of a boost in flexibility otherwise. So a single level in a secondary class will get you those abilities at half character level (another option would be character level -4 or -5).
This style of character doesn't have all of the actions or survivability bonuses that they would have as two separate, lower leveled characters, so we toss them a few extra bonuses to try and help them out and grant hit dice and skill points (assuming you're not using a skill variant where they matter more) based on their character level. Save bonuses are also an option for this treatment, but BAB and CL probably shouldn't be considered.
Mechanics
For a simple, two class setup, this would work as follows. You advance in your primary class, ClassA to whatever level you feel like, and then you take 1 level in a second class, ClassB. You would gain a hit die and skill points for your new level, retain all of the abilities of your primary class at a level equal to your character level -1, and gain all of the abilities of the second class as if you had a level in it equal to half your character level (rounded down). You would also gain retroactive hit dice and skill points for up to half of your character levels. After that, you could go back to advancing only your primary class, and be a ClassA X-1, ClassB X/2 henceforth (where X is equal to your character level) using whichever numeric bonuses were larger at any given time. And every even level you would get ClassB's hit die and skill points if they were greater than ClassA's. If you instead took a second level of ClassB, the levels would look like ClassA X-2, ClassB X-2 (Character level X). They would basically be a full gestalt of Class A and Class B with 2 extra hit dice and 2 extra levels worth of skill points, and some bonuses and abilities that trail their single classed friends.
At low levels, this reduces to basic multiclassing. You can be a 1/1 or a 2/1 or a any real differences. As soon as you advance to 4th character level, however, you become a full gestalt and each level advances the abilities for both classes.
Example
Start off as a Wizard 4. Take a level in rogue. Gain an additional wizard hit die, wizard skill points, and replace your first two levels worth of wizard hit dice and skill points with rogue points. Gain abilities of 2nd level rogue, and use whichever BAB/Saves are better. Currently character level 5 with 5HD, 5 sets of skill points, and the abilities of a 4th level class and a 2nd level class.
- At next level, if you take wizard you gain wizard 5 BAB/Saves/Abilities, rogue 3 BAB/Saves/Abilities, and rogue hit dice and skill points (because they're better, and that would give you 3 levels of them). Currently character level 6 with 6HD, 6 sets of skill points, and the abilities of a 5th level class and a 3rd level class.
- If you instead take a level of rogue at next level, you become wizard 4/rogue 4 gestalt and follow all gestalt rules. Replace any remaining wizard hit dice and skill points with rogue hit dice and skill points, and gain an extra rogue hit die and skill points. Currently character level 6 with 6HD, 6 sets of skill points, and the abilities of 2 4th level classes.
Known Bugs:
This admittedly works weirdly with prestige classes. For most prestige classes you could do it such that you can only advance 1 prestige class at any given character level, so you could be a wizard 6, wizard prestige class 4, rogue 10 (character level 12). It doesn't work with multiclass patch prestige classes at all really, not without dropping some of the advancement scheme. If someone wanted to rogue/wizard into arcane trickster, they shouldn't get two sets of SA boosts or spell casting advancements. Simply eliminating both separate progressions for the single prestige patch class progression seems a bit weak off hand if you allow multiple progressions for people who select non-patch prestige classes. Probably workable with on-the-spot adjustments though.
This also doesn't model work for multiclassing more than 2 classes very well. The cost for each additional class goes down as you fall behind your character level and your abilities become less level appropriate. You only need 1 level in your third class, so you can add in a ClassC by taking ClassA X-3, ClassB 2, ClassC 1 to get a gestalt like ClassA X-3, ClassB X-3, ClassC X-3 (Character level X) or ClassA X-2, ClassB 1, ClassC 1 to get a gestalt like ClassA X-2, ClassB X/2, ClassC X/2 (Character level X). The cost for a fourth class is even less, and basically doesn't work at all unless you are already a 3 way gestalt. It would look like ClassA X-3, ClassB 2, ClassC 1, ClassD 1 to get a gestalt like ClassA X-4, ClassB X-4, ClassC X-4, ClassD X-4 (Character level X), but those are a bitlot unwieldy. Anything more than 4 classes probably doesn't work at all.
Since this means that multiclass casters are casting like cohorts, this has issues in games with leadership cohorts. The easy way to patch that is to tone down cohorts in the first place, but if you don't want to do that this is a less good thing all around.