Aim or Gamesense

Should i practice more Aim or should i focus on knowledge about the game?

Im stuck in Ascendant

I peaked ascendant so maybe my insight isn't the most helpful
but you can pretty much always work on aim, regardless of if it's keeping you in a certain rank it'll benefit you in the long run
game sense is very broad, you gotta get someone higher rank to VOD review you and tell you what you're doing wrong if you wanna improve at it in the most efficient way (ideally you know someone who's higher rank who'll do it for free, a lot of coaching prices are super high)

focus on game knowledge, a good aimer is heavily limited by stupidity while FNS can reach radiant