When I go on hiking trips, I wear proper boots. However, when I lace them tight, my ankles swell terribly after a few hours and start feeling funny (bending the joint feels like touching a balloon). There is also light pain in the ankles while walking. After I remove the boots, the pain disappears, but the funny feeling doesn't. This is not a problem of ill-fitting boots, it happened with three different models. As far as I can tell, the only reason is the weight of the boot falling on my ankle every time I lift my leg for a step (probably connected with my gait).
I tried lacing them loose, and even leaving the low ankle hooks out. But this is a problem on rough terrain. When I am jumping down boulder rivers, or moving along an eroded karst face stepping on 5 cm wide ledges, I need lots of precision, and have to be absolutely sure that my foot won't move within the boot after I have landed on it, changing my balance. Also, ankle support is required on such trails, as a wrong landing with ankle bending can result in a complicated fracture which can't heal without loss of movement in the joint.
My normal lacing procedure (I learned it from a professional hiking guide) is to place the foot on the heel, the angle between the backside of the calf and the floor around 75°, the angle between tibia and sole at 90°. Then slightly tighten the laces in front, run the laces through the ankle hooks, then run them through the two hooks on the shaft and pull them to close the shoe, then knot. The boot feels OK this way, it isn't too tight and doesn't pinch. It feels as good as my sneakers, in which I can walk kilometers without any problems. There are no protrusions within the boot, nothing chafes, it is comfortable (and has been like this since day one - my current pair are expensive brand-name boots with memory foam and so on).
Any ideas what can I do to avoid the problem while keeping the boot tight enough?