fyi, for some credibility(not epeen or anything close to it), Im the highest dps elemental shaman on wws(been highest ele on patchwerk for past 4 weeks, each week getting better , this week I did 5200).
Now when You gear Your shamans, You should aim for hit, sp, then haste, and at the end of the chain You have crit. You might ask why? Its simple, we already have 100% crit chance on our hardest hitting spell, that's basically almost 40% of our damage, also come next patch EM will add tons of crit, that should last You through whole heroism.
Spell hit for heroics isn't much, its just 3%(2% with blueberry).
At 543 def You can still eat crits quite often, while def is Your priority stat in the beginning, once You get there You should look for gear with dodge, its the cheapest avoidance stat.
Now my take on resto vs 4 ele.
I used 4 ele shamans for whole tbc duration, from slave pens to soloing kara. I did most heroics with 4 of them specced ele in wrath....then I rerolled a new tank to replace my paladin, and i decided to make a switch to one resto, 3 ele/dk unholy tank. And all I want to say is what a difference, everything got so much easier, content that used to be quite hard is nothing now, yesterday I ran 10 or 11 heroics, with one wipe due to stupidity. I can run up and pull 2, sometimes 3 groups of mobs and heal just fine. From this point one of my girls will always be resto, tbh I think its much better solution then burn 4 ele team.
Strat event isn't hard once you get a little bit of gear, did with about 3 minutes on the timer.

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