Well fights you can't win are a danger, though there are some things you can do to survive, EG craft yourself some gear, make sure to remember to eat, and of course practice the fine art of cowardice , since even if you can't use the /exit command to beat a hasty retreat, you can always get back to the world map by running straight out of an area, the jump command is useful too.
Always inspect your enemies, and if they're too tough take note.
My only problem in terms of combat is that it is a little lengthy to keep looking each time enemies move to check range.
with NVdA at least, the quick actions window always turns up at the top, so you can speed actions up by hitting ctrl home to go to it and clicking from there, similarly you can always get to the edit area quickly. The only slightly problematic thing is finding the end of the log/beginning of the nearby list, since it's usually quicker to go from the bottom, hence the need for headings.
With classes, if you mean the Astronomer's ability, I've tried the astronomer class, but I'm guessing whatever the benefit is, either I've not been around the world map at night to see it activate, or it is purely graphical and makes no difference.
Besides in a game with so many interesting classes, only having one would be depressing .
I admit at the moment I'm in two minds about Fara. ON the one hand I'm loving the exploration and complexity and all the locations, on the other I don't like the fact that I always feel rather stuck with really progressing in the game due to the mapping problem, and that some of the screen navigating is a bit long winded at the moment, though I suspect if the waypoint thing were fixed I'd probably put up with that for the sake of an interesting game.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)