Ok I am pretty skilled in surface blending but I have never come across this type of problme I am kinda stuck here I managed to finish it but the transition between the surfaces is not as it should be. Basicaly I have thracian helmet

Now as seen here I need a smooth transition between round surface and the head band surface. I need a curvature match of the two surfaces

the problem is in the edge but also in the depth of the depressed round form even if I were to round the edge the depth of the round depression would not align with the head band. How can I overcome? I want to get smooth blending like the image below. the mode lis finished but it has been bothering me