Re iterating Malto above.
If you have never hiked a lot in the desert be forewarned that it is really easy to get blisters when you would not expect it. The PCT in the desert and other desert hikes result in MUCH hotter feet than an equivalent temperature day on say the AT. This is because you are going to be in the sun almost all the time and that means that the actual temperature for your feet is going to be a good 15-20 degrees hotter or more than the shade temperature.
Thus actual boots are asking for trouble as would a waterproof barely breathable shoe be.
I have no idea why, but some people seem to never, or very rarely, get rocks/sticks/whatever in their shoes, but without gaiters I can't go 1/8th of a mile without getting something in my trailrunners. I use OR Sparkplug gaiters that are similar to DG.
Ever had a goathead get in your shoe? Yes on the DG gaiters!
“He is richest who is content with the least, for content is the wealth of nature.” –Socrates
I love them any time there's loose debris on the trail to get into the shoes. Sand, gravel, tiny twigs, etc - doesn't really matter. I wear my shoes very loose for both hiking and running, making it a lot easier for things to fall in. Dirty Girls solve that problem and after a minute or two I don't even notice they're there.
FWIW, I got a pair of Altra Lone Peak 3.0 trail runners for Christmas. I realized just yesterday they have a built in Velcro tab on the heel for securing gaiters like DG. Have not seen this on shoes before
Trying to adapt to changing times (not easy for us dinosaurs) I switched to Moab Ventilators for trail hiking. I don't like that they get wet so easily/ I like that they dry out easily. I got 500 miles out of my first pair.
But I think I'm going back to boots. Too much dirt and dust gets in through the mesh. I even got a blister in the San Felipe Hills. I never get blisters. I think the grit and dirt is why you constantly read of the huge blister problems the modern PCT hiker suffers with.
I blister no matter what, huge double-layer bleeding ones on the sides of my feet, always just a question of degree. So much for goretex "breathing".
Ever thought about trying trail runners, or at least light, breathable mids??
Sounds as if you have some fundamental issues that require professional attention. Constantly having blisters is not acceptable and I wouldn't get on a trail of any length until I had that sorted out. It is possible to NEVER have blisters.
Well no one knows your feet like you and what works best. One would have to say your description is very unusual. It could be the plantar problem you mentioned makes you move your foot in an unusual way that effects how a shoe fits you or prevents a properly fitted shoe from working for you.
Do you have to wear boots in your regular life or what type of shoe do you wear. I wear hiking shoes 100% of the time just to keep my feet particularly tuned into that style of shoe.
cmoulder is on a good point that blisters all the time, especially in the same place all the time implies it can be fixed and that the shoe might not fit you. Feet adapt usually and get really thick calluses to stop that and if that does not eventually happen it is worth figuring out why. Your issue does sound like one where professional expertise is something to seek out. Most of us with high mileage have far more experience than most doctors when it comes to things like blisters, but not something like you are describing.
Re: taping. Have you tried Lukotape? If not I suggest giving it a try. It is leaps and bounds better than regular first aid tape (that white stuff) or duct tape. It is a kind of surgical tape which does not roll on the edge and it (in my experience) is impervious to getting wet and coming off. On the rare occasions I start to get a hot spot I tape it up and leave the tape on for about 3 days. I have a callus underneath when I take it off. I have seen the most horrible blisters treated successfully with it.
If you try it I would suggest taping your bad spot(s) before you even start. Don't wait for them to get the blisters. And see if that helps.
Blisters (absent a medical reason) are caused by heat, friction and moisture. If you can control even two of them pretty well you can almost eliminate them. The only blisters I have had in the last 10,000 miles were when I switched to a new shoe and put too many miles on or by trying thicker socks and getting a much hotter and wetter foot.
Another item to experiment on is different techniques to tying your shoes. A whole host of problems with a poorly fitting shoe or painful feet can be helped just by tying your shoes a different way. Check here for some ideas: http://www.fieggen.com/shoelace/lacingmethods.htm a search will find more.
I use a lock lacing technique which makes the shoe fit tightly so it cannot slip at all (but it requires double eyelets at the top of the shoe which I have to have added at the cobblers with most shoes). Others hate this.
Socks are a big deal and there is no right way. I use one pair of the thinnest socks the temps will allow - silk weight or lightweight womens socks. I never wear two pairs as I think that makes blisters not prevents them. Others are the opposite. Lots of experimenting might help. I find the DarnTough socks many love make it more likely to get blisters and the thinner Smartwool far better. Others opposite.
Good luck
Sometimes what we think is the solution is in fact the problem.
Your problem is so bad I wouldn't even take a stab at diagnosing it. I'm not a professional anyway, and if you've seen a professional who says nothing can be done then you need a better professional because you're likely dealing with a hack who doesn't know squat about the needs of hikers. Blisters are caused by pressure and friction and those are things that can be addressed with better fitting (perhaps custom or customized) shoes and/or orthotics, etc.
But hey, it's your cross to bear...
Sounds more like a wicking problem combined with footwear that is ill fitting. Typically the only time I have to "tape up" prior to a hike is because the footgear I am using is worn out and no longer works properly. Prior to that point no tape or bandages are necessary with normal use.
I like Dirty Girl Gaiters. Keeps 'stuff' out of your shoes. Lightweight, stretch lycra material. Cool designs. Gives a 'Seasoned Citizen' hiker some style points.
Here's my 'flame to fame.' https://dirtygirlgaiters.com/flames/hottie.html
2013 AT Thru-hike: 3/21 to 8/19
Schedule: https://docs.google.com/spreadsheets...t1M/edit#gid=0
I bought the outdoor research gaiters because I got a deal and bought them for $11 as a factory second. Fit is pretty poor, especially around the ankle, it is very loose and requires several pairs of socks to fit correctly (I am a size 14 and bought the L/XL gaiters). Despite never buying dirty girl gaiters, I would think they are better than these poorly made OR gaiters.