Dr. Voodoo with Quake/Hawkeye synergy

Warzone_Blaster08

The synergy increases the Ability Accuracy of all members of the team by 15%, and Doctor Voodoo's awakened ability also increases ability accuracy (by 100%). My question is, how would it work? Would the 15% ability accuracy be applied, and then doubled thanks to his sig? Or would it go the other way round and his sig would double his standard first and then the synergy would add 15%? Or would both simply grant increased ability accuracy from his base chance?