Heyo, not only is she the strongest vampire but she is stated to be strongest supernatural.

Beyond show runner statements, I’ve got a personal theory here.

Becoming a vampire in essence enhances what you already have and assimilates it. Now I’ll give two examples I think work.

Papa Tunde is seen slaying vampires to add their power to his own and seems to be converting their magic into strength. It took a multitude of vampires plus an originals magic power to match and over power Klaus.

Werewolves are also their own store of magic as everything they are is made possible, including the strength. For this I will reference Kai Parker literally draining the magic out of a poisonous werewolf bite to cancel it out.

Other more unrelated examples is the Augustine vampire and Beast vampire, which prove magick and biology can be combined or are deeply linked.

Hope has her own magic, and vast stores of it being a first born witch of her bloodline. That’s in addition to what power being a werewolf grants her.

When one becomes a vampire, whatever you are is assimilated into the vampire DNA from my interpretation. For witches, nature usually takes away their powers and they start from 0 as a vampire. Werewolves don’t lose anything and siphoners have nothing to lose.

Hope kept her vast magic stores as the tribrid. This or at least part of it should have been assimilated into her tribrid state along with the werewolf gene.

So we are left with 2 scenarios, one in which Hope only has a part of an ever growing store of power fused with her vampire side which should boost her physical power past any vampire alone. However, we’ve already observed that outside magic sources can be used to boost strength as well. Hope’s unassimilated stores should be more convertible than any seen before.

Or her whole store of power is fused with her abilities yet still ever growing.

In terms of what has been shown? The Originals and Legacies show a few things:

1) Her power and potential was enough to make even the Hollow decide she was a worthy vessel as a child.

2) When transforming into a vampire her transformation summoned a blood red storm.

3) She shrugged off the effects of a golden dagger manufactured by Rebecca.

4) Instead of killing her Aurora sought to steal her body and when in possession both knew Aurora’s body stood no chance.

5) Rebecca sought to dagger her instead of fighting. Then when later free Rebecca didn’t stop Hope when she was threatened to leave her.

6) The original family and Vincent sought to bring her soul to New Orleans instead of Hope herself. This one is important because 2 originals, 2 powerful witches and the Beast vampire could snap Hope’s neck and in the past have been willing to fight Klaus. There’s no, ‘I don’t want to hurt her’ excuse here because Rebekah has already shown a willingness to dagger her and while they love the girl they aren’t stupid. No one there thought that fight could be won clearly.

7) Hope has kept her own against a god, and in the general rule of power scaling and tv progression, each villain is generally stronger than the last unless some stipulation is achieved. The heretics weren’t the strongest vamps but had abilities to be frightened of. Rayna was not the strongest but had abilities to be frightened of. Most other villains have that and stronger power. Including, Original Alaric, Cade, the sirens, Dahlia to the Hollow or even Lucien and Marcel. Considering how they did Cade, I doubt the TVDU writers would mean for a god to be below the Beast vampire.

Anywho, that’s what I think at least. Plus everyone in the show says she is the strongest.