Some spells can have increased power (it's written in their descriptions, by the way). These have a small + button uner their icons in the quick bar. Press it to increase modifier and thus power of spell. As a general rule it pays to cast them with the maximum modifier availible at the moment (unless you want to conserve AP, but there's little reason to, it regenerates quite fast).
The game is a bit intimidating for people who never saw any TDE game. It's quite a bit more complicated than D&D. The Drakensang system is cut down to about one fifth, compared to the Realms of Arkania games, but the character sheet is still many pages long. Also, the English manual leaves out many important aspects, so you have to find out many things by yourself.
The game lets you stack potions and sharpen weapons when paused. Not very realistic, but if there's no other way, just do it. At least the latter, given you don't have potions.
I think they are out of business anyway, or they are making Facebook games, obtain it right away. (There is no way how your pity money could give us third episode.)
The whetstones you find everywhere. Or their improved variant.
It's called "Fastness of Body". Good for everyone, btw.
It's - tedious. The game is full of trash mobs and sports a few questionable design decisions. However, if you really want to try it, note that there are solutions for the slow walking speed and the lengthy looting/skinning animations. I think I was half an hour into the game when I went to the forums to look for a solution to that. It took a bit of SQLite database hacking, but that was easy even for a relatively computer illiterate like me.
