Okay, FUCK the abhorrent beast.
This is my 3rd time dealing with this fuck, and it's the beggar, so it's weaker than the chalice dungeon form, but I got stuck on him for like an hour.
I like aggressive bosses, but this is just stupid. The main reliable strategy to beat him, atleast on that I found, is to just dodge his attacks, attack once, then back off. But his attacks are fast, hard to predict, and hit hard as fuck. Technically he doesn't have 1 hit kill attacks, but if you get hit by one, and chances are you'll be too stunned to dodge the next two, so it might as well be a 1hk. And while I understand he's not an official boss, the road to him is so frustratingly long.
He's not a fun boss to fight at all for me. I know he has some fans here, but he's not complex or interesting, he's just a locomotive I feel like you can only fight one way, and if you fuck up once, you're done. I don't think that's very fun. I've gotten stuck on bosses before, but he's the only one that actually frustrates me.