If you want to shut off your brain and just get told what to do, try taking a look at www.maxdps.com

You really don't need a lot of spellhit as an elem shaman, you have tons from talents/totems, and will have maxed out hit on anything but bosses (instance bosses that shows as a skull).
Crit is lovely, so is damage, and it really depends on what kind of gear you have which will give you the most benefit. Maxdps.com is a calculator, you plot in your stats and it tells you what adding an item (including gems) to your gear would mean for your optimal dps. Lovely tool.