From what I see, get Ninja and Galek up to 6 stars. If you don't have a better AoE Decrease Defense champ by then (like Dhukk or Vergis) then you should move on to Warmaiden.

I see Dagger in there they would be a better Def down then warmadian I think.

Oh shoot. Looked right over her. Good point. Ninja, Galek and Dagger. Those would be my first 3 6 stars.

Psylar is very good and most often underrated...she is one of the best turn meter controls. Put her into a stun set and she will rock

Thanks  all.  and  which  one  can  i  use  for  food?

All the greens and whites. The only uncommons worth saving are Armiger and Shieldguard.