Chalice - few questions

[Corwin]

I have few questions about Chalice.

1. Is there a limit on how many troops it can heal each turn? I have a lot of injured soldiers, but I wonder if I should be careful not to bring too many injured weaklings, to not accidently reduce chances of my best soldiers to get healing.

2. The questing knights who can try to take away the chalice - how big of a headache are they? How often do they come? Is it an assasination attmept or do they attack a province? If it is asasination, is there a standart limit of 5 commanders that could be brought to battle with Chalice's owner? And these knigths - how tough are they and how many of them usually come?

3. Who heals better - Chalice, Faery Queen, or Arco priestess? I remember they heal with various efficiency, but I dont' remember the numbers.

Thanks!