Ok, so to answer...
Custom Footbeds: I am using Superfeet Blue footbeds. Not "true" custom, but much better than stock. They do work pretty well and I use them in my other boots too.
Size: I wear US size 9, mens for everyday wear. Not to harp on it, but my soft boots are Mondo Point sized, and even more, are the same manufacturer. Both these and my hardboots are m26, (US Mens 8) In my Deeluxe Vicious soft boots, my toes do touch the end of the boot. (I almost returned thinking they may be too small.)
Shell size/ room: The shells are m25-27.5. When I put my foot in, no liner, I can fit 2-3 finders from my heel to the back of the boot.
Liner Size: The liner is an Intuition Dreamliner, M26. I do feel like it may be a bit big, my toes do not touch the front, about a finger of space. quite possibly/probably packed out.
Cant: My Bad, I made a typo earlier. I have TD1 bindings, not TD2. My cants are setup like this: _____>____<_____. So slanted towards the middle of the board, 3 in the front, 6 in the rear. Not much in terms of adjustment for those.
I do actually tend to weight myself on the outside of my feet as well. After this last time, I feel like the pain is from my foot being too loose, I don't know how trying loose to start will work but it is something I can try.
I have not been to a boot fitter (besides a quick heat molding at Sport Chalet), I don't really know of any nearby (southern California)