Shaman - Nec/Sk/? Dungeon Duo

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From what I've seen, yet another..

Hi, I started here a few weeks ago and talked a friend into joining too. We're going to be lvling duo with a Shaman/X. From a general stand point, we chose shaman because what we read lead us to believe that the shaman/x is one of the more powerful crawlers. Is that the case? We would like to be able at the endgame, to duo some of the harder/(greedy) camps and kill named mobs.

Do we go Necro or SK? We're both new but have a general understanding of game mechanics, is root-rot goin to be our bread and butter? Would the SK be better here in the long run if not?

Is there a better option? I don't know if we have what it takes for a charm style duo. Not sure if Enc is a no-go, maybe. How is Mage/Nec? On the Nec/Nec I have seen, do the dots stack? Is nec outta the picture for dungeons? Do we throw a druid in the mix? Not min/maxers but we would like to be faster than say a war/clr but the main preference is ease, meaning, less running around, more taking the hits or rooting.


Bottom line, like everyone else here, we want to go deep. In dungeons. Is this the combo for us?

Thanks for any input! Oh and on a side but important note, we would like to be able to eventually twink some melee alts. So any camps that might have the more expensive items that we would want could also be taken into consideration for the duo.



TL;DR
The goal: Duo from 1-60 w/ occasional groups. With the majority of exp coming from dungeon crawls. Shaman/SK or Shaman/Nec or Shaman/X?