Well, dura and avaliability go to Ilyana probably. Weapons to Soren. He also gets base Meteor.
How bout:
Meg between Muarim and Skrimir,
Swap Mordecai and Soren.
Other stuff:
Isn't Sothe free?
Isn't BK free?
Gareth should be lower, or Pellease should be higher. 1 chapter and being laguz with a gem < 7 chapters with dark magic. He should promote by 4-5 if you're using him.
Nasir should be higher too. Speed is good, regardless of mode.
Lucia should probably go down.
Nailah might want to go between Mia and Gatrie.
List of things Heather can steal:
Dracosheild
Bolting
Energy Drop
White Gem (Senator)
Ashera Icon (Senator)
Statue Frag
Random Vulnearies
Things from the DB
Bunch of other stuff too
Combat isn't perfect, but I'd say she can go over Elincia, maybe Boyd if someone can argue her really well.