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 a Scion-of-Sorcery that command the hordes of a Hivemaster:
For the Scion-of-High-Sorcery and Hivemaster mythic paths from Mythic Paths of the Lost Spheres:
Sanguine Slavery (Mythic)
Your magic causes the power of your servitors to come alive within your own blood.
Prerequisites: Dual-Path feat, Power of My Kin primacy and the What is Mine Hivemaster path ability.
Benefit: Servitor creatures can be considered blood-relations for the for all Hivemaster and Scion-of-High-Sorcery abilities. Additionally, spell-like abilities of these creatures are now considered spontaneous arcane spells known by them. For more information on Servitor creatures see page 14 of Mythic Paths of the Lost Spheres.
You can get Mythic Paths of the Lost Spheres on: RPGNow or Paizo or d20.pfsrd.com!
"Find the Hero Within" - Lost Spheres Publishing 