Sorry for the long post, but I've stumped more than a couple boot fitters and figured I'd try my luck here.
I just got Dalbello Krypton Kryzmas in size 21 with the intuition liners, B flex tongue (trying to find a stiffer one), and custom foot beds. I am still having issues. General info:
--Extremely hyper mobile ankles. Dorsiflexion has been described as excessive and I can just about lay my lateral malleolus on the ground while standing if I so desire. I crush nearly any woman's boot out there.
--Small, low volume foot, with exception of forefoot that measures 98 mm.
--5'2, 125#, and ski aggressively, preferring off piste terrain, steeps, and trees.
I've cycled through a couple of boots in the past couple of years, and the only boot that has ever performed well for me was a Nordica Doberman. Unfortunately, these boots were so painful and cold that I couldn't ski in them for more than a day at a time, and forget about hitting the hike to terrain.
With the exception of the Dobermans, all boots I've been in have allowed suppination, even when in a flexed stance, despite the fact that I tend to pronate without footbeds. Canting one way or the other (or even playing with shims on the hill,) just throws my ankles in the other direction, so this seems to be an issue with the boot volume and support at the level of the ankle rather than just the heel. (As an experiment, I got the heels so tight that they go numb inside of 20 minutes, yet the downhill ankle still gets strain along the lateral aspect.) The only way I've been able to take up volume to stabilize my ankles is to add a heel lift. This eliminates shin/ medial malleolus bang because I'm higher in the boot, but compresses me to a silly extent, and is the absolutely wrong thing to do with hyper mobility, but it's better to burn my quads and sacrifice my stance than sprain my ankle inside the boot while attempting a groomer. I've padded the outside of my ankles as well, but I'm not sure that's enough.
I go from being able to ski nearly anything to struggling with making it down the groomers. It's killing me. Any suggestions?