There should only be one real amount of tightness for boots. They should be snug enough all around so your foot isn't moving around or the heel is lifting, but they shouldn't cut off circulation eihter. The best way to buckle boots is to do the second from top buckle first, then the top buckle, then alternate tightening the two until its snug. Then, pull the powerstrap so it is tight and strap it that way. Finally, do the bottom two buckles just enough for the boot to be snug, no tighter. If you crank them down, then it cuts off the veins on top of the foot and makes the foot go cold. Going super loose doesn't really help any. If you ski them loose because you get cold otherwise, follow my instructions, that should help. A moving foot will negate the ability for the binding to release safely, so that's why i highly recommend a snug, yet forgiving boot fit.
RIP RICK JAMES