In the BBCS2 Haida Loop Tutorial video (http://www.youtube.com/watch?v=G2akL1jhRrM), there is a list at the 5:10 mark that organizes the list of cast in the following order:
(Short)
Line 1 : Tager Valkenhayn Hakumen Rachel
Line 2 : Ragna Mu Taokaka Carl
Line 3 : Jin Makoto Arakune Hazama
Line 4 : Tsubaki Bang Litchi
Line 5 : Platinum Lambda Noel
(Tall)
The kanji to the left of line one and five I put in parenthesis, and from my knowledge they correspond to height. That being said, I’m not sure if the list only takes into consideration the height requirement necessary to haida the characters (sorry, my Japanese is very limited).
Not surprisingly, many of the trends you have found correspond to the order of the list, with the upper characters being relatively easier to haida than the lower. I also noticed some patterns in the list that might make it easier to remember how to haida them:
Line 1 is easy. Line 3 require at least one 6A. Line 4, 6A works the best in every rep, etc.
This obviously doesn’t hold true in every case, but it does help me remember what to do when I practice.
Additionally, at the 3:30 mark, there is a statement about Noel and Lambda. It talks about something along the lines of 22B > 6C not working on them (I can’t translate that kanji…). You already discovered that, but when I first saw it (and this guide wasn‘t made), it made a lot of sense because I was trying to haida Noel for the longest time.
I’ll try to see if there is more in the video I can understand.