Xerath

Strengths

It's easier to land Arcanopulse on an enemy when they're moving toward or away from you, rather than side to side.
Eye of Destruction will make landing Arcanopulse easier as the target will be slowed.
If you stun an enemy with Shocking Orb, follow up with a guaranteed center hit on Eye of Destruction.

Passive · Mana Surge — Xerath's basic attacks periodically restore Mana. Whenever Xerath kills a unit, this cooldown is reduced.
Q · Arcanopulse — Fires a long-range beam of energy, dealing magic damage to all targets hit.
W · Eye of Destruction — Calls down a barrage of arcane energy, slowing and dealing magic damage to all enemies in an area. Targets in the middle receive additional damage and a stronger slow.
E · Shocking Orb — Deals magic damage to an enemy and stuns them.
Ultimate · Rite of the Arcane — Xerath immobilizes himself and gains numerous long-range barrages.

A suggested 5-lane lineup built around Xerath, based on hero partnerships and role synergy — not win rate.