An important idea is that you're not only drafting to make a generally good deck, you're drafting to defeat the immediate challenges that are coming up.

If you're in Act 2 and headed for an elite, you have to think, "can my deck beat book of stabbing? gremlin leader? taskmaster?".

If right now your deck sucks against the book, and you're offered a disarm or caltrops, it might be worth picking it even if it's doesn't generally make your deck stronger. Cause otherwise you might get stabbed to death.

On the flip side, Demon Form is a very strong card, but it's practically a curse for most of Act 1, because it's too costly and slow. So sometimes you might skip even a strong card if it doesn't help you right now.