Half loop combinations works for who doesn't have good double axels (Pogorilaya,Radionova,Edmunds) Sotnikova have 2A+3T unlike those skaters and actually with half loop you are giving couple of points because of 2T base value higher than half loop base value.
If two 2A+3T are allowed (Lipnitskaia did in her junior years) this layout could work for her.
4toe or 3lutz
I don't imagine Adelina being able to do either quad because her 3T isn't very straight and her 3S isn't one of her best jumps.
I want to see it first to believe it. Right now this is just for media attention.
Personally I think that she should polish her existing technical elements first before doing something that will cause her more injuries. Trying to do something dangerous might affect her existing array of technical elements. Like how Mao's 3A affected her other jumps.
When she was little, Mao practiced quad salchow (http://www.youtube.com/watch?v=1yEgPt-faII) and quad loop (I can't find a clip but it's somewhere on YouTube), and as I understand it, practicing the quad salchow made her lose her timing on her triple salchow, and I think it took her a long time to get the triple salchow back. So I think someone who practices a triple-axel or quad jump will risk losing the same jump done with less rotation for a while at least.
But when I see Mao's triple salchow now, she almost over-rotates this jump, and I wish I could see her trying a quad salchow again. Still, I think a quad jump is enormously difficult for even the most athletically gifted of women, and it would require a whole lot of training, and doing a great deal of the jump with pristine technique, for a woman to pull it off, I think.
So many people are prone to dissing Mao's axel technique, but in fact, her technique is really, really good, and that's why she can do a triple-axel.