A fair amount has been written on blisters recently, I found it all very useful. From how you describe what you are going though seems a bit like I went through 5 pairs of boots ago? I can only offer the suggestion that you need to study your feet well, understand your gait, are your boots wearing evenly and have you judged it well as to tightly your boots should fit? Are your present boots a bit too big for you? Do you walk 'badly'? Does your feet tilt to one side? Do you have too much inside movement? Have you tried inserts, to help your boots 'grab' your feet more comfortably and firmly? How much, over time, if any will your boots stretch? In the end I personally had to buy new boots, in my case ladies versions and from then I've had no further problems.
I for one, having tried plasters. cremes and so on, eventually came to the conclusion that they only cover problems and once stopped the possibility is, that either they will just return, or hopefully, in time your feet will settle down and the issues will just go away?
I no longer get blisters which I believe is partly because I now know how to buy boots that fit me securely, both in the ankle area and at the toes end. I also have inserts into my boots, I wear decent socks and practice good feet routines each day. Whenever I stop, I take my boots off, let my feet cool, wipe them thoroughly, massage and wiggle them around, obviously ensure my toenails are cut and smooth, turn my socks inside out and off I go again until the next stop.