I'm on my second character now (Feanor, the Noldor Arcane Blade) and since I'm actually getting somewhere I figure I should ask a few question before I curse him horribly. I don't want any big spoilers though please - roguelikes are much more fun to learn through trial and error

Firstly, about some of the stats... What does Fatigue do? Is Armour a damage resistance, whilst defence is an evasion stat? Are higher stats better for everything? In particular is speed best high or low? What is 'APR'? Of the 6 main stats, is there any particular reason to bother increasing ones non-relevant to your class? Is there any way to see the information about them (what they affect) other than on levelling up? What's the dominant stat behind Stamina?
Second, about items. What the heck does slime mold do? I've tried drinking it and the effect was not noticeable. Are there any easy identification methods beyond the somewhat rare scrolls and shops? Currently I just compare prices at shops to see what's worth spending a scroll on, but it's leaving a lot of bits of junk always unidentified. Hmm, and I guess one spoily bit of information I'd like to know: how high does the Magic stat have to be for identify scrolls to work on the whole inventory?
Going further down the spoily route... I've just emerged victorious after a very close encounter with the second boss. Four new areas have been recommended to me, with no real idea of which I can handle right now. Any advice on where to go next, without revealing too much information? I'm level 9, stats STR 28, DEX 17, MAG 20, WIL 12, CUN 12, CON 15. Mostly relying on Stunning Blade and Arcane Combat to lay waste to anything that comes close.
Any other discrete advice is most appreciated!