Here is my link to my armory

Ëarth

All of my characters are geared the exact same.

My question is can I start to run 5 shamen boxxed instances now? If so is this going to be the best avenue for me to venture down or are quests still going to be my best form of XP?

Im some what worried about A) not not having a tank. and B) haveing nothing but quest gear. So based on those two thoughts what do you feel is the best for me to do? Also where (if you say go instance)