TeemVizzle
Overhaul and High Specs because despite the chisaki being absurdly strong, it takes a great deal of knowledge to use it with maximum efficiency. I've always compared Chisaki's quirk to Momo's and despite being quite broken he can't make a nuclear bomb without the right materials while Momo just has to study a diagram and eat a cake. If we put together Overhaul and High Specs which I believe is a massive increase in mental capacity which among them are possibly Photographic Memory and High Information Processing, The combined powers would make it possible to create highly complex structures on a massive scale. Written by Google Translate
The Quirks I would want in an apocalypse; Blood Control/Electrification and Review. The reasons are simple, review lets me dismantle and reassemble any structure, and that would be very useful for attacking, defending, and building bases. I have other methods and I use that quirk, and I think it feels right. Now, about blood control I don't think I need to explain, as a Quirk that allows me to control my blood, I could stop the virus from circulating right in my body easily, I would probably be immune since I could stop the virus from circulating through my blood control, so that would be a life generation, and I would have overhaul to help with that. Eletritication is simply very useful, as you can activate power generators and various machines that stop working for power, and that would be the main reason why I want it, besides having ways to use it, use it, like others to speed up my thought process and reaction, do something similar to killua's nen transformation of hxh and other uses. Those were the quirks I would choose, no doubt.