Spells: What is MIrror Image useful for?

[moderation]

http://www.shrapnelcommunity.com/thr...=&fpart=2&vc=1

http://www.shrapnelcommunity.com/thr...=&fpart=2&vc=1

After reading these two threads I am under the impression that Mirror Image and glamour have changed a bit. I still have a few questions though.

1. Are Mirror Image effect and glamour that Vans and Eriu get the same effect?

2. What exactly do the extra images do? Enemy troops seem to still surround my pretender in melee after he casts Mirror Image, and they still seem to be attacking him instead of his images. My defense hasn't gone up, and it doesn't seem to protect much from archers. What is it good for?

3. It does not seem to protect from precision 100 spells, but does it protect from spells with less than 100 precision?

4. What else could it protect you from in theory?

5. Is Mirror Image worth it as a buff compared to other spells? I usually replace it with Mistform since there's a limited number of buffs I can cast before a battle and it doesn't seem to serve much purpose.