How tight should you lace your boots ?
I have it easy across the ball of the foot gradually increasing in tension to tightest at the ankle and just above. That, with the two pairs of socks I mentioned earlier, has worked for me hiking for many many years on many terrains. Not had a blister from hiking now for over 40 years. (I'm sure that the venerable Sod's Law will now apply itself to my person later this week!)