Eldritch knights can cast a cantrip and make a weapon attack at 7th.
Meaning they can blade ward + attack.
And Sorcerers can use Blade Ward and then Quicken another spell, limited only by their available Sorcery Points.
I've also used it a lot with a fighter/bladelock build in Heavy Armor with with Heavy Armor Master. Cast Armor of Agathys (duration 1 hour) and then cast Bladeward - either when you are about to enter a room in a dungeon or cast it and deliberately provoke an opp attack. They hit you and take damage from the Armor of Agathys, and your damage is reduced by 3 and then cut in half, which preserves the temp HP from Armor of Agathys and allows you to take multiple hits before it ends.
All this. The cantrip really did not seem designed for the casual wizard, but for a frontline who has some arcane capabilities and means to retaliate. It works wonders with Armor of Agathys even without the feat Heavy Armor Master. It is also quite decent if you know you will get pummeled by all sides, in the cases when dodge won't do much good. Of course, if a simple wizard gets themselves into such a bad situation, I don't really expect a single cantrip will save their arcane arses.