As maokai, Split push during the mid-game and try to secure side objectives. Avoid grouping when your Ultimate R is down.

Group with your team when your Ultimate R is up. Rotate from the side lane to wherever your team is and look for a pick with your Ultimate R.

Peel for your allies in team fights. As you’re a tank, you’re rather weak unless your carries are alive. Thus, keeping them alive is key in team fights. Be prepared to peel for them when necessary.  As maokai, Divide the thrust during the middle of the game and try to secure the secondary goals. Avoid regrouping when your Ultimate R is down. Group with your team when your Ultimate R is up. Rotate from the side lane to where your team is and look for a choice with your Ultimate R. Peel for your allies in team fighting. As you are a tank, you are rather weak unless your aircraft carriers are alive. So keeping them alive is the key in team fighting. Be ready to peel for them when needed.