Summoner Spell

The two of most important spell that Xerath should take is:
To slow your opponent and easier to take them with your spell combo.To chase your opponent or flee from them when necessary, one of my favorite spell though.


These are the spells that you should think TWICE before you bring them:To faster your movement speed, not really useful though.Heal you and your nearby allies when necessary good in early game but a bit useless in late game.Can gradually damage your opponent as a true damage, but you can kill them fast with your spell combo.

Runes
I take 0.95 armor penetration for Greater Mark of Insight to pierce my opponents with Xerath spell combo.
I take 0.1 AP per level for Greater Seal of Force so you get AP when you leveling up.
I take 0.17 AP per level for Greater Glyph of Force, you will get AP when you leveling up.
I take + 5 AP for Greater Quintessence of Potency so you will get high AP from start.

Spell Combo:

Useto hit your target and leave mark on it, then useImmediately and finish them of with,useif necessary.

When an enemies minion waves come,, just use Locus of Power and immediately use Arcanopulse in straight line, then another Arcanopules if they still alive and you simply get gold.