As ryze, At this stage of the game, you want to put yourself in a side lane and focus on farming so you have a stronger late game.

In the later parts of the mid-game and when the enemy starts to group, make sure you follow suit and start to group with your team.

Use your Ultimate R to get picks with your allies on enemies who are isolated or split up from their team. If you can catch someone out, try to take the Dragon or Baron afterwards.  As ryze, At this stage of the game, you want to get into a secondary track and focus on agriculture so you have a stronger game late. In the later parts of the middle game and when the enemy starts to group, make sure to follow the sequence and start grouping with your team. Use your ultimate R to get choices with your allies on enemies who are isolated or separated from their team. If you can catch someone, try to take the Dragon or Baron after.