Thanks for the compliment, but my experience doesn't count for much.. you die a lot in roguelikes, that's just how it works. Until you strike it lucky with a combo that works and can get through the game. I remember in ADOM realising that a Troll Healer born under the sign of the candle practically regenerated in real time, or actually getting how mages or achers worked and that they were awesome.
So far most of the classes seem reasonably decent, just need to get the hang of it.

That's the problem, I have no idea. I unlocked one by completing a quest, so I imagine others are the same. I could look up a guide but that would ruin the surprise. So I'm just exploring the world (when I get that far) and hoping to find stuff.