can someone guide me to a list, which unit drops on the urgent missions? I really need more witches so.

My list now:
1. Mission: Assasins Arrow
Rita, iron Archer
2. Mission: Sneak Attack From the Shadows
Rita, ?, ?
3. Mission: Chreeping Shadow
Rita, (silver) Healer Alissa, (bronze) Archer Wilfried
4. Mission: Raining Arrwos From Heaven
Rita lvl 12, ?, ?, silver Spirit
5. Mission:Ready for the Final Battle
Rita lvl 16, (silver) Pirate Verotte,?, platinum Spirit