Femke has the same PR in 200 and 400 as Mu.
I'd try to get her down to 48 in the 400m, and go from there.
with a bit of aerobic added, Mu at here best would be challenged to beat this gal in 800.
that would be a great rivalry.
both going for the 400 and 800 double.
and totally forget the 1500, where you need to close in 157 800m to get on the podium.