Linear workflow help: Blender EXR -> After Effects VFX(Confused Here) -> DaVinci

I'm creating a fully 3D animation in Blender, adding VFX elements in After Effects, and color grading in DaVinci Resolve. Need guidance on proper linear workflow:

Current pipeline:

1. Blender: OpenEXR (RGB Half, DWAA)
2. After Effects: Adding H.264 VFX elements (fire/energy)
3. DaVinci: Linear grade + final transform

Questions:

• Best color space settings for EXR export from Blender
• How to properly match H.264 VFX elements to linear EXR
• Correct DaVinci color pipeline for CG content
• Output transform recommendations

Seeing conflicting advice online about proper CG/VFX color management. Any help