Xerath has very reliable wave clear and push thanks to his low cooldown abilities and kit. Avoid taking unnecessary damage by standing outside of the minion wave when he uses his abilities.
Be careful when it comes to trading with Xerath when he seems to have no mana. He can get mana for free from his Passive when auto attacking, which he could then use to turn the exchange around.
Look to trade with Xerath when his or is on cooldown. When he doesn’t have either of these abilities, he is incredibly vulnerable. Mix this with his low mobility- he is easy pickings for any would be aggressor.
In team fights, try to flank the Xerath as he will stand in the backline dishing out damage from afar with his long ranged abilities. Flanking and locking him down will definitely turn the tide of the team fight in your favour.
Xerath will try to delay a team fight for as long as possible while he dishes out damage with his , and . Do not let him do this by engaging and starting a team fight as soon as possible.
Xerath struggles against champions with crowd control because he is relatively immobile. Lock him down with crowd control when he moves forward to poke.
Once Xerath unlocks his , it gives him a lot of extra poke and damage. Do not overstay your welcome when low- and do not go window shopping when recalling when he has it up.
When Xerath has his Luden’s Echo, it will drastically increase his poke and push power as he can use 2 Q’s and a to clear the wave and push it. Be careful when leaving lane vs Xerath when he has this item as he will quickly push it.
When Xerath has his maxed- which is usually at level 9, he will deal a lot of damage. It is incredibly important that you dodge his but more so after level 9.