Need some basic game mechanics explained better

[hickmanj]

Okay, I've put in about 20-30 hours (in one weekend!) but need some basic mechanics explained to me - b/c I still am not sure I'm fully "getting it"

1) Rage: I see the little red icon/dragon circle but my question is: can you trigger rage the way you cast a spell or use a power or does it auto-trigger? I am playing a mage so I'm not sure if that makes a difference. But when I see my armies do damage surrounded by a red border that is rage damage correct? I mainly want to make sure that I'm not missing a way to trigger it.

I don't have the "box" yet and have no idea what it is like (didn't play the demo) so maybe that will make Rage points clearer?

2) I have open "boxes" where learned spells can go and I've deleted all my scrolls yet, when I go to get a new scroll, it keeps telling me I have no room in my spell book??? Does intellect control this somehow? I can see the empty space - so I'm not sure what is going on. Also, is there any way to delete permanent spells or are they in your book forever?

3) Are mana and rage potions usable in combat or only on the strategic map? If usable in combat - how?

Those are what I can think of right now.... I'd appreciate feedback.

Thank you!

J