As lissandra, Avoid team fighting in the late game unless your Ultimate R and Zhonya’s Hourglass is up. If you try to team fight when either one of them are down, you will be rather vulnerable.

Use your abilities in the late game to peel for your carries to keep them alive. Use your Ultimate R on the nearest enemy champion and focus them down first.

Stay with your team at all times. Do not leave them and go to split push as the enemy may force a fight while you’re gone. Stay grouped, but be prepared to stay off to the side and out of vision. As lissandra, Avoid team fighting at the end of the game unless your Ultimate R and Zhonyas Hourglass are in place. If you try to fight as a team when one of them is down, you will be rather vulnerable. Use your capabilities at the end of the game to peel your aircraft carriers to keep them alive. Use your Ultimate R on the nearest enemy champion and focus them first. Stay with your team at all times. Don't leave them and go to split thrust as the enemy can force a fight while you're gone. Stay grouped, but be ready to stay on the side and out of sight.