This Version 2.0 paper presents an expanded and empirically grounded formulation of the Synthesis Intelligence Quotient (SIQ) and the Multi-Layered Thinking framework, integrating IQ, EQ, CQ, and AQ into a multiplicative intelligence model.The update introduces Monte Carlo simulations (n = 1000) demonstrating a statistically significant predictive advantage of SIQ over IQ-only models (r ≈ 0.55; +15.01% uplift), and refines theoretical connections to embodied cognition, emotional intelligence, creativity research, and adversity resilience.Furthermore, this version extends the SIQ model into the Quantum-Bio-Hybrid (Q-BH) AGI paradigm, proposing an expanded hybrid metric (SIQQBH) incorporating quantum coherence, bio-entropy, and hybrid network density. The work outlines a practical multi-layer AGI architecture integrating Embodiment, Emotional/Social cognition, Creative recombination, Adversity-driven metacognition, and Value Quotient (V-Q) for ethical alignment.Overall, this paper provides a theoretical and empirical foundation for next-generation AGI design, human-AI coexistence, and a redefinition of intelligence suitable for the post-IQ era.This version supersedes V1 while remaining linked under the same concept DOI: 10.5281/zenodo.17521289.