Rogue Emblems: Margaret or Sif?

Gameplay Help & Tactics
1

After Margaret got buffed i’m considering to give her more emblems… or should I save them for Sif who is not maxed yet? Opinions?

They are my only five star rogues, and my four star rogues are barely getting used… I have almost 500 rogue emblems unused in my inventory.

2

Sif, maybe try and take both to +7 unless you get Jackel or Brynhild

3

If they dodge, does their special still work if active?