Juust to give you a quick update.

Went to deadmines yesterday as level 16 and it was....how shall I put it...challenging

I took down the first boss with a couple of wipes, some was my lack of coordination (wipes on trash) but the wipe on the boss was because I ran out of mana on my elemental shamans, so no dps == wipe.
I think Ill get another level or two and try again.

Regarding the group composition, thank you for the helpful hints. I have no intention of PvP'in with this setup, so that is not a concern. Regarding the bear tanking, as far as I can see its relatively simple compared to, for example, warrior tanking, so I think it fits my very limited attention capabilities fine