Does the Grant's AOE scale with Faith?

Also, will the AOE guarantee a 100% knockback on high poise targets as implied in the wiki? Even when dead-angled?

Useless fun fact: The Grant is actually a flaming torch. A white flame since it belongs to the WoW covenant. You're basically bashing poeple with the olympic torch. I like it.

If it's anything like the Moonlight Greatsword, it scales with Faith.
It's AoE is a Wrath of the Gods.

Grant scales A in faith. That applies to the wrath of the gods special attack as implied in its info page.

Fun fact, a 50 faith Grant special will do more damage per enemy than a 50 faith darkmoon talisman wrath of the gods despite having both the suns ring and crown of dusk equipped. These two buffs do not affect the Grant.

As far as knockback I am not sure. I know the few times my high poise (53 and up) characters took shots from it they were knocked back. One would have to test this and include can the Grant AoE knockback those who use Havels shield buff as well?

Well, dead angles would definitely have a knockback effect on any poise level. I'm really curious as to whether you can outright stagger those with 76 poise or above without dead angling. I don't have a build that can use it so i can't test it out myself.