I constantly struggle with him to reach 100k with 6* Sin as lead, Legendary uniform, and even slotted a lot of urus. Obelisk has 25% ignore dodge, 21% max-hp and 100% proc.
That was yesterday : https://i.imgur.com/Bx9hSu1.jpg
Vulture died at around 80k and Kraven had to do the rest did the rest. If i manage to keep Vulture alive the whole time i get maybe 105k ..
And yes, somehow i always get hit in the 0.1s gaps between the iframes or whatever. He once even died when my screen showed him high in the air before the crashdown of the #5 skill.
I can clear abx without uni, but only barely and I spent quite a lot of resources on him (180 proc, rank 9 poah, etc). If you can get an ignore dodge+proc for him, it should be a piece of cake.