As skarner, In the late game, continue to look for plays with your Ultimate and E. If you pull the carries into your team, then just focus them. If you don’t pull the squishies in, just peel and protect for your allies.

To make getting on the enemy backline easier, group with your team but stay off to the side. If you flank from an unwarded bush, the enemy will find it harder to react to your all-in. Avoid splitting or being away from your team in the late game as the enemy will force a fight while you’re gone.

Play around your Ultimate cooldown in the late game. Avoid team fighting when your Ultimate is down to ensure that you’re useful in team fights!
 As skarner, At the end of the game, keep looking for games with your Ultimate and E. If you pull the doors in your team, then just focus them. If you don't pull the squishes in, just peel and protect for your allies. To make it easier to get to the enemy rear line, group up with your team but stay out of the way. If you're flanking a non-warded bush, the enemy will find it harder to react to your all-in. Avoid dividing or being away from your team in the late match as the enemy will force a fight while you're gone. Play around your cooldown Ultimate in the late match. Avoid team fighting when your Ultimate is down to make sure you're useful in team fighting!