With the academic stats you shared, absent some huge achievement in an EC, it is unlikely that your D will gain admission at an Ivy without recruiting support. Unless her times improve dramatically, it is also unlikely she will be offered D1 if she is currently on the bubble.
As far as timing is concerned, NESCAC’s cannot offer official full support until after pre-reads are done in the summer before senior year. The timing/process discussion should be between your D and the coaches that have interest.
School fit should be your D’s top priority, and participation in intercollegiate sports should be part of the equation. For one of my kids, starting immediately on a NESCAC team as well as going to a smaller more intimate school, drove her decision. S was recruited by a number of selective D3’s, including NESCACs, but after his visits, he decided that he wanted a larger school experience and went to an Ivy without being a recruit but enjoyed his sports at a Club level.