Grog wrote:
Sure. If you want to maintain BAB 1/1, you can only multiclass to classes with BAB of 1/1. However, for less than BAB 1/1, there is a "right" level to multiclass at to maximize your BAB.
Quick example:
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Suppose I'm trying to make an 12th level character with Weapon Specialization, Rogue abilities, and some Rogue prestige class. The best option min/maxing is Fighter 4, Rogue 4, Rogue-prestige class 4 (with same BAB and save progression as Rogue).
My BAB is no worse by multiclassing than if I'd gone Fighter 4, Rogue 8, yet my saves are substantially better with the additional class. BAB is +12 in both cases.
In the first case, saves are +4/+1/+1, +1/+4/+1 and +1/+4/+1 for a total of +6/+9/+3.
In the second case saves are +4/+1/+1 and +2/+6/+2, for a total of +6/+7/+3.
i.e. I pick up +2 to Reflex saves by multiclassing and getting the +2 at 1st level.
This is fixed by what I posted above, you'd end up with saves of +6/+7/+3 in both cases.