For me,
i select a few openings and stick to it, dont study openings much after that.
Strategy is important. I spend considerable time looking at GM games and lectures to identify ideas and plans in different positions.
I used to spend a lot of time on tactics before, but now i practice tactics about 2/3 times a week. It has changed my style of playing chess from before as well.
Engame. I believe it is the most valuable asset. If you are better than your opponent at endgame, then you can just exchange all pieces and expect to win drawn positions. It makes you feel much more confident about your chances of winning. It also reduces the odds of losing considerably.
Let me know what you think
For a player rated in the high 1600s looking to get to 1800, what is the proper allocation of study time between opening, strategy, tactics, endgame, and playing training games?
In reviewing my games, I'm starting to believe that tactics deserve the lion's share for me but curious what others think in a vacuum (not knowing the specific player trying to go from high 1600's to 1800).