Follow up:

I did some research on wow-loot.com and see there are some good RESTO upgrades to my gear. However most are from Heroic drops. Since I have trouble doing Botanica heroic (which is rated a 4 and supposed to be super easy), I think the others would be hard as well. Any advice on the best way to gear up a new resto shammy?

What about more avoidance on the Tank? How can I get him a bit higher so that I take less damage - would any pvp or arena gear be helpful here?

My Shammy crew will have 1300 Arena points as of next wednesday. I was going to buy the S3 pants for them. Currently have S2 weapon, S2 help and S4 hands but I am still far from having super good DPS.