Skipping through most of the later additions i’d like to add to the original post that i find her being all that powerful very much beleivable. we know that before she took the name scarlet and went into this madness she had a glimpse of what she and her mentor thought was the eternal alchemy. Thats the point where she stopped being a genius and became more of a force of nature with an influence in tyria equal to that of an elder dragon.
That being said, its hard to tell what she saw and what happend to her when she participated in that experiment, she might as well be the avatar of an elder dragon or something even worse, because she is definitely no longer a simple sylvari.
i’m not super knowledgable about her past so i might have some parts there incorrect, correct me if you wish.