Chris, how do you use your image system for 2-3 twisted corners? I might adopt images for twisted corners.
I tried out Mike's idea of having my regular images just upside down. I found this was difficult for me as most of my journey locations are outdoor spaces, so I had a hard time picturing them upside down as it felt "weird" for them to be suspended in thin air. It sort of gave me the impression that the image was flying, and this would lead me to try to recall from my flying images when I got to the flipped piece.
My system now works very well for me, but it might seem a bit weird at first. Using this approach I can memorize 3/7 of all cases with 2 twisted corners using only a single letter image, 4/7 of all 2 twisted corner cases using one letter pair image, 3/8 of all three corner twisted cases with both one letter pair image and one single letter image, and 5/8 of all three corner twisted cases with two letter pair images.
Flipping two adjacent corners
For 2 flipped corners I do the following:
I memorize one edge sticker for an adjacent pair of corners that need to be flipped. I use double sunes to flipped pairs of corners, and pretty much have ever since I began BLD. The names I give the cases are from 2003 when I first started doing BLD. I give each pair a name of either "Same" or "Opposite" and I use the letters "S" and "O" to memorize during a solve.
The following are the algs I use to solve each case:
S = R' U2 R U R' U R L U2 L' U' L U' L'
O = L' U' L U' L' U2 L R U R' U R U2 R'
The only thing I changed is how I call these cases. Rather than calling the case where UFR twists counter-clockwise which UBR twists clockwise "S" I now call it "I", which is my sticker letter for the RU edge location. If I had an "O" case (UFR twists clockwise and UBR twists counter-clockwise) I would call it "C" which is my sticker letter for the UR edge location.
So now I can identify an S or O pair anywhere on the cube. The letter "K" would be an S pair on the RF edge of the cube (UFR twists clockwise and DFR twists counter-clockwise).
This means that I can memorize any adjacent pair of corners that twist opposite directions using only one letter. This accounts for 3/7 of all possible cases with 2 corners flipped.
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Flipping 2 non-adjacent corners
For these cases I memorize as follows. Let's say that UFL needs to twist counter-clockwise and DFR needs to twist clockwise. If I do the setup turn R, I get an S pair at the FU edge location. To memorize this case I pick any sticker on the DFR corner and I take the letter "F", which is the letter for an S pair at FU and I make a letter pair image out of them. I pick the letter that has the most memorable image when paired with F (and I make sure to avoid double pairs like FF, etc.) I would probably pick XF which is the Phantom of the Opera.
Now when I see XF during memo, I notice that I have only a letter pair image. Having only a letter pair image
always means that the first letter is a corner sticker, and the second letter is the edge sticker that I need to move that particular corner sticker adjacent to, and this creates either the O or S pair at that edge sticker location.
So, for example, XF would tell me to take the DFR corner and move it adjacent to the FU location (the setup turn R does this) and then do either the S or O pair that the edge sticker represents. Afterward I would know to undo the setup turn.
This handles the 4/7 of the two corners twisted orientation cases where the two twisted corners are not adjacent to each other.
3 corners, including the buffer
For these cases I memorize one sticker from each of the non-buffer corners, as well as the twist direction. This gives me a letter pair image, followed by a single letter image. The only possible way this could happen is if 3 corners twist the same direction, one of which is the buffer corner.
So let's say that DFR, UFR, and the buffer after solving (UBL) have to all twist clockwise. I would take a sticker from each of the first two corners, X, and D respectively, and I would add a letter for the twist direction. A=clockwise B=counterclockwise. So my image here would be XD A or the Barad Dur tower from Lord of the Rings with the eye of Sauron (in miniature) being heckled by Dan Aykroyd.
When I see this during my memo I notice a letter pair image, and a single pair image. This tells me that the first two letters are stickers on permuted but disoriented corners. The last sticker is always the twist direction, so since only 2 corner stickers are represented then I know to include the buffer as well. The last letter A tells me that all 3 pieces twist clockwise to solve.
Twist three corners not including the buffer
Same idea as above, only I have 3 stickers (one from each corner) and the twist direction letter at the end. This gives me two letter pair images. The only possible way I could have two letter pair images is to have three twisted corners (not including the buffer, since all 3 corners are represented) and the last letter tells me the twist direction.
I can make sure to avoid letter doubles (AA, BB) by intelligent sticker choices during memo.
Currently I'm memorizing and solving in the same order as you, but for twisted corners I use my feet to remember as much as I can.
If there's 1 corner twisted, I take the foot that is on the same side of the cube (L/R face) and angle it right for CW and left for CCW.
If there's 2 twisted, then if one is on R and the other on L, I can use the technique described above. Otherwise, I just kind of remember them visually.
I often stop the timer in a rush and forget to fix the twisted corners. I could definitely fix this bad habit over time, but as you can see, my foot system really only works for 1-2 images and is still shaky even for 2. If I adopted images for twisted corners I might extend my corners to 2 locations along my journey, as I currently just cram them all into one room every time.
I may try to add in a foot element as a double check, but so far my image system is surprisingly easy to use, for me, and it's a relief to not have to try to hold onto the visual corner twist memo throughout the edge auditory loop memo. Auditory loop single syllable word memo is surprisingly taxing on the brain for me, so I think this is why I forget the corner twists so often. I will probably also now use two locations to memo corners on all solves.
Sorry for putting you through that.
To be honest, I probably would never have noticed that this was a faked scramble until I calculated the probability of a scramble like that. I certainly didn't notice anything fishy with the scramble algorithm at first. I only got suspicious when I saw that it was an approximately 1 in 9 million chance that a scramble like that would come up 
really good time too!
