GUARD: multimodal -> VLM only TIER 1 Tiny: VLM->Dense->MoE TIER 2 Light: VLM->Dense->MoE TIER 3 Medium: MoE<->Dense (40% spill)->VLM TIER 4 Heavy: Dense->MoE->VLM (quality first) TIER 5 Default: MoE<->Dense (40% spill)->VLM HINTS: speed->VLM, quality->MoE, code->Dense + moe_spillover(): 60/40 MoE/Dense load distribution