Many Mythic Paths in Mythic Paths of the Lost Spheres support multiclass characters but as of yet there aren’t many multi-path mechanics out there despite the Dual-Path feat. But the possibilities are endless for path interaction and one such option exists for Hivemasters who are familiar with the aspects of the Will-of-All path:
For the Hivemaster AND Will-of-All mythic path from Mythic Paths of the Lost Spheres:
Oneness of the Hive (Mythic)
Your zone effects can transfer allies’ powers to your servitor creatures.
Prerequisites: Dual-Path feat, Unity of the Drone and a Zone creating Will-of-All path ability.
Benefit: When both a servitor and non-servitor ally are in your Zone effect you may expend a use of mythic power as a swift action to allow your non-servitor ally to act through the servitor’s form. This effect does not grant your ally additional actions, rather allows the ally to use the form of your servitor to act through either their own body or the servitor, changing body of control as a free action once a round. The servitor’s mind tries is best to act through the body of the non-servitor ally to the best of its ability. For rule considerations refer to the marionette possession spell. This effect lasts for 1 round per tier. For more information of servitors see Rules Element: Servitors page 14 in Mythic Paths of the Lost Spheres.
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"Find the Hero Within" - Lost Spheres Publishing 