Main thing is your tank. Make sure you have BoE epics on your tank and/or take them solo to some 10 man Naxx to gear up. Once your tank has better gear, heroics will be much easier. Might also need to have your priest spec holy/disc if they aren't already, but it largely depends on your tank's gear.


Edit - I check your warrior's armory and it looks like you have good enough gear for the easier heroics.
http://www.wowarmory.com/character-s...idan&n=Evalius

This thread sorts Heroics by difficulty. I'm not sure how up to date it is, but I think it's reasonably accurate:
WotLK heroics sorted by difficulty