A question for all you Grand Champions out there

Hi all, for the last 3 seasons I've been going back and forth between C1 and C2 in both 2s and 3s and usually get C1 in solo standard, I wanted to try and make the push for grand champion in season 10 so a question for all you season 8/9 grand champs out there:

What do you see as the necessary skills to hit grand champion and how do you go about learning and perfecting these skills?

I feel I've gotten so far by being a team player and rotating well, I'm not a mechanical god but my play is solid.

Feel free to DM me for my steam name if any of you want to play, but I am in Europe and only speak English, sorry!