Disclaimer, I rarely know what I'm doing, but you might try this.

The boots don't seem to fit at all, her foot is floating. Do the boots have a hip body part? sometimes I can adjust this up the y axis. Usually conforming things wont move based on the body parameter. So try adjust hip param. Also the boots are longer than her legs. Can you adjust the y scale of the boots? Then, hide the shin of V4 so no poke thru.

It might help. Sorry if it doesn't.