I like my Catek FR2 Pros. They are ultra stiff, however they lack a toe-cap and are fairly heavy.
How exactly could the highback be responsible for rolling your ankle? That says boot / you to me.
I blame it on the TT30 highbacks because they are noticeably smaller than those of my Malavita's. Although Malavita's are also considered park binders they provide better support, as far as I am concerned. But I suppose it could very well be my boots. I have noticed that my Ride Deuce's are packing-out after only five days of use, while the length has remained snug.