best routine for deadlifting and squat?

[Khazima]

Going to failure when training for strength is counterproductive. A rep or two before failure is good, but never to failure.

I agree, you shouldn't be missing reps in training. You should be have structured progression within your capabilities. Only time you should miss a rep is if you're testing at a meet, or if you don't compete, just when you're testing.

[The Deadlifting Dog]

I agree, you shouldn't be missing reps in training. You should be have structured progression within your capabilities. Only time you should miss a rep is if you're testing at a meet, or if you don't compete, just when you're testing.

I agree and disagree.
I think you don't want to miss reps on a single or double rep set but...
If you are doing a burnout set after doing your heavy sets then going to failure is fine in my book.
What you don't want to do is go to failure on a set and then try to hit a heavy single. That is just silly.