I did try Druid and I didn't like the gameplay.

Like I explained in my first post I don't plan to stay away and nuke the mobs (if I do so, I won't be able to proc the MP5 regen)

My plan is to go close combat with the warrior (which is the main tank) decrease the incoming damage with his shouts and the Shaman Totem, increasing my own team damage with his battle shout and Shaman Totem (+STR / +AGI) put an AOE Fire Totem and just auto-attack mob and slowly regen mana.

At lvl 60 you get :
+290 AP from the Warrior
+90 STR (180 AP) from the Earth Totem
+90 AGI (4,5% Crit) from the Air Totem
+550 AP from Rockbiter Buff (i won't have the Talent to increase it)

So even without being an enhancement Shaman having always +1020 AP, i should be able to make descent DPS whith slow Staff.
So for me not going in close combat is like loosing free DPS, even if i'm Elem spec.