If all the commonly used 5E abjuration spells get implemented, I think Abjuration has a shot.
Githyanki racial features give you everything you need for incredible abjuration wizards. With 14 DEX, you can have a base AC of 17, after stealing Lae’zel’s armor. For gish builds, you can dump INT for the Warped Headband of Intellect. Putting points into STR gives you a reliable shove (bonus action disengage / instant kill) and allows you to wield a great sword (Sword of Justice) to good effect.
