@zylan Determining if a high poly mesh is acceptable really boils down to how closely the shapes in the model match the shapes in the references and whether or not the topology subdivides cleanly, without generating any noticeable smoothing artifacts or other surface quality issues. If the shapes and surface quality checks…
Your 'Npole' (a vertex where 5 edges converge) in question is located on the transition boundary which will certainly throw shading artifacts once subd is applied so I would suggest a re-routing solution: For example: Hence your 5 vertex polygon is converted to a 4 vertices face that will enable smooth shading and…