sorc boots on AD MF?

impure shots/ult
???????????????????????????????????????????????????

impure shots/ult
???????????????????????????????????????????????????
you could go AP MF and build
or 
ya i like BC on AP mf. alot. LW seems like a waste of a slot tho. bc provides more benefit to your ult (shredding everyones armor for your entire team) and has cdr... and more AD.
Probably makes sense. her post lvl 109 dmg is so weak because of that magic damage