As amumu, Ensure that you are present in any given team fight especially during this phase of the game. Do not squander about to another lane to accumulate CS to get an item.

Make it a point to check your team's positioning before starting a fight. There is no point in initiating a fight when your team can't follow up on you.

Flanking the enemy team and using the fog of war to bamboozle enemies is the way to go during this phase of the game. Ensure that you are warding it properly at all times. As amumu, Make sure you are present in any particular team fight during this phase of the game. Do not waste on any other way to accumulate CS to get an element. Make a point to check your team's positioning before starting a fight. There is no point to start a fight when your team can't follow on you. Flanking the enemy team and using the war fog for bamboozle enemies is the way to go during this phase of the game. Make sure you keep it right at all times.