We’re not comparing Dumbledore in his thirties to Snape in his thirties, but Snape in his thirties to AD at “64”. If we assume that he’s been using his time turner since age 11, like HP (though based on his backstory, it seems he got a large intelligence boost at 10, so that might be where he started), he’s effectively over 77 when he fought Grindelwald, giving Snape upwards of 4 decades (longer than he has lived thus far) to reach Grindelwald-defeating levels of power. In addition, we know that Snape has good reasons to hide how powerful he is (especially in MoR) and has a substantial amount of muggle knowledge. These all indicate that he’s in the same league as Dumbledore, but benefits from not broadcasting the fact. This would also explain the way he was described in MoR.
And...
...the book said that a successful Legilimens was extremely rare, rarer than a perfect Occlumens, because almost no one had enough mental discipline.
Mental discipline?
Harry had collected stories about a man who routinely lost his temper in class and blew up at young children.
...but this same man, when Harry had spoken of the Dark Lord still being alive, had responded instantly and perfectly—reacting in precisely the way that someone completely ignorant would react.
The man stalked about Hogwarts with the air of an assassin, radiating danger...
...which was exactly not what a real assassin should do. Real assassins should look like meek little accountants until they killed you.
He was the Head of House for proud and aristocratic Slytherin, and he wore a robe with spotted stains from bits of potions and ingredients, which two minutes of magic could have removed.
Harry noticed that he was confused.
And his threat estimate of the Head of House Slytherin shot up astronomically.
We’re not comparing Dumbledore in his thirties to Snape in his thirties, but Snape in his thirties to AD at “64”.
Right; by ‘extra decade’ I meant another decade above the three Dumbledore was already older than Snape.
It seems unlikely to me that what made Dumbledore able to defeat Grindelwald at ~78 was that he was 78, rather than that he was Dumbledore. From EY several comments above:
Bones, in this fic, is an ancient and experienced witch. Forty-four simultaneous strikes from upper-year Hogwarts students will definitely bring down Madam Bones, maybe even if she does have time to reinforce and strengthen her shields. Dumbledore would wave the Elder Wand, once.
We do know now that Dumbledore had a phoenix to help him out in the duel with Grindelwald, and so we might suppose that the equipment advantage was balanced between the two instead of heavily favoring Grindelwald. (My impression is that the Elder Wand is better to have than a phoenix in a duel, but that’s just an impression.)
But I don’t know what Dumbledore looked like in his early thirties. We see him at 18 and then at 64, and perhaps he passed through where Snape is now at about thirty. My guess is not.
Keep in mind, in HPMoR, it’s heavily implied that AD’s artificially aged because he’s been overusing time-turners, possibly since his Hogwarts days.
Assuming he’s been using the full 6 hours since age 18, that would only give him an extra decade on Snape.
We’re not comparing Dumbledore in his thirties to Snape in his thirties, but Snape in his thirties to AD at “64”. If we assume that he’s been using his time turner since age 11, like HP (though based on his backstory, it seems he got a large intelligence boost at 10, so that might be where he started), he’s effectively over 77 when he fought Grindelwald, giving Snape upwards of 4 decades (longer than he has lived thus far) to reach Grindelwald-defeating levels of power. In addition, we know that Snape has good reasons to hide how powerful he is (especially in MoR) and has a substantial amount of muggle knowledge. These all indicate that he’s in the same league as Dumbledore, but benefits from not broadcasting the fact. This would also explain the way he was described in MoR.
Right; by ‘extra decade’ I meant another decade above the three Dumbledore was already older than Snape.
It seems unlikely to me that what made Dumbledore able to defeat Grindelwald at ~78 was that he was 78, rather than that he was Dumbledore. From EY several comments above:
We do know now that Dumbledore had a phoenix to help him out in the duel with Grindelwald, and so we might suppose that the equipment advantage was balanced between the two instead of heavily favoring Grindelwald. (My impression is that the Elder Wand is better to have than a phoenix in a duel, but that’s just an impression.)
But I don’t know what Dumbledore looked like in his early thirties. We see him at 18 and then at 64, and perhaps he passed through where Snape is now at about thirty. My guess is not.