For the top, I think I would try making rounds of smaller shells, going down to 6 dc, then then etc
узор 801 | каталог вязаных спицами узоров
Pattern spokes 956 \'For a hat\'
free cable knitting pattern, chart only. Just look at pin image, link doesn't lead to pattern as far as I can tell but to the front page of the russian website this is from.
Узор 713 косы в ромбах | каталог вязаных спицами узоров