Fuck skinning. Bomb stuns and big bursting dynamite is SOOO much better it is not even comparable. And I'm an off healer, really made for offensive dispells and DPS.
Purgelawl
As oldschool as draenei can get really... 60k kills, FC set and spell set. Three BoA maces, +22 int/+30spell/+20 spirit.
A little over 60k kills now, WSG killin' and planting Flag of Ownerships are my part-time jobs.
Yee yee
~Purge
Very nice, but I would say Engineering is better than Skinning unless you plan on being in arenas all the time.
Other than that, you stated what you need.
Shamans shouldnt have a problem with ANY class - period. You are probably trying to heal WAY too late or are kiting wrong.
I havn't lost to a rogue on my shaman for probably a year and a half now, rogue's just don't have the ability to do so unless they are stacked full of nature...
Yes, Evocator's Blade with +22 int and Buzzer Blade with +30 spell is fine.
Forest Buckler with +7 stam is for the start of the fight, once you wear out the stam and int you switch to Arctic Buckler with +4 mp5/hp5 - this will last you most of the fight.