I think Kitty and Rogue should wrestle for third and fourth place. Psylocke, as much as I love her, doesn't have as much exposure as the others to be fourth but there seems to be an upward trend with her. Emma could have secured fourth a few years ago, but she has lost a lot of relevance unfortunately. Afterward, I think Rachel edges Magik out because Rachel is in more titles.
Dazzler has been going in a very questionable "upward" trend, Tempus seems to be being built up, and Polaris is too isolated in X-Factor but they're what I would consider the middle area.
I really laugh that X-23 or M were even considered. I think Jubilee has more relevance than those two, and she's constantly written out and now with baby.