Good effort finding connections for a Lemore = Elia theory. I think this is a lot more promising than some theories proposing Lemore = Ashara. Yet, I ultimately lean toward Elia and Aegon being dead. Maybe the Mountain is lying when he confesses in front of the KL court that he murdered Elia and her children during Tyrion's TBC but I find that unlikely. It also undermines the Dornish plot lines in a big way. It would at least diminish Doran's grievances against the Lannisters. Maybe Elia disappeared and has lived secretly without Doran's knowledge, again I find it unlikely. Certainly not impossible though.