I'm really looking forward to this list as well. I mix at 70/30 but lean towards similar percentages that you use in your 50/50 could be many reasons why but I don't it seems like 14-15% works well for me too.
I just got done with the fire and ice experiment, made a batch of extreme ice at 15% and a batch of red hots at a shade under 7% then filled the pro tank about 3/4 of the way up. In that 3/4 tank was about 2/3 extreme ice and 1/3 red hots (maybe slightly less red hots). It turned out pretty well but its a bit spicy cuz of the red hots of course
I can't imagine vaping it by itself lol. Probably used too high of a percentage at 7% for 70/30 but for this experiment it serves its purpose and will last longer.