To improve these skills I recommend to listen to music while playing deathmatch. When you listen to music, you don't hear every steps so you have to check more places. It's better than muting the game, because you can still hear some things...

You can plant without sage wall. Get site controll. You dont need Sage to heal 24/7. Stop forcing people into playing sage even if they dont usually play her. If you get sage cool. If not, deal with it.