profile2 - change default edit path to custom profile
Well actually you can, there is a submodule of the profile2 called "profile pages"


  With profile2 user account settings and user profiles are conceptually
  different things, e.g. with the "Profile pages" module enabled users
  get two separate menu links "My account" and "My profile".


Via the included "Profile pages" module profiles can be viewed and edited at their own page and get their own menu link, e.g. "My profile".

with the profile menu paths already setted up for your custom profile then you need to remove the edit tab that points to the default profile edit page of drupal. For delete this tab follow this tutorial http://www.zyxware.com/articles/4159/solved-drupal-how-to-hide-menu-tabs-and-menu-links-in-drupal-7

Then you can add your own edit tab that will link to your custom profile edit page https://www.drupal.org/node/1578582