View source for Gestalt Style Multiclassing (3.5e Variant Rule)

====Determining Hit Die====
You have a total number of hit dice equal to your character level. Your hit die is the largest die granted by either your primary class or any secondary class in which you have 2 levels. If you would increase your hit die as a result of new secondary levels, you immediately gain 2 hit points + 1 hit point per character level per die size difference, and roll the larger die in the future.

You gain no benefit to your hit die from a secondary class in which you have only 1 level.
Author	Tarkisflux +
Identifier	3.5e Variant Rule +
Rated By	Leziad +, RiverOffers +, DanielDraco +, Foxwarrior + and Ghostwheel +
Rating	Rated 2.8 / 4 +
Summary	A multiclassing variant that advances between 2 and 4 classes simultaneously, removing dips and multiclass patch prestige classes. +
Title	Gestalt Style Multiclassing +