Physical Quantum Processing Units (QPUs) require ultra-precise classical control systems to execute phase rotation gatesbefore quantum states suffer thermal decoherence. This paper presents a novel hybrid architecture that unifies the Arithmetic DescentAlgorithm (ADA) with a nested 2D complex root decomposition framework (3 × 3 bifurcation). By mapping higher-dimensional (9D)entangled state vectors into isolated 2D complex planes (C), we establish an “Associative Shield” that eliminates non-commutativestructural distortions. Simultaneously, the ADA cubic engine (k = 3) is injected into the classical control loop, replacing costlytranscendental De Moivre phase computations with multiplier-free finite difference subtractions. We prove that the structural invariant3! = 6 of ADA generates the exact 40◦ angular nonagon increments needed for 9th-root quantum phase compilation. This hybridapproach eliminates algorithmic timing jitter (O(1) temporal determinism), drastically reduces hardware overhead, and enablesfault-tolerant quantum control execution suitable for power-constrained or harsh avionics environments.