What are the ability score improvements? Should a player just pour all points into strength every ASI, or is it a mix of strength and dexterity, or is there some other option that's better? ​I was looking at the guide all day and made an account just to ask lol

All strength.

That guide is like 7 years old and now obsolete. It's a good starting point if you're just going to sprint through the game; but to maximize the run, check out the top two runs that use Dorn and utilize item duping and some skips

Cheers! Ask anything, Check the discord page too :)