Most folks forget to mention that Gundrak Heroic has 3 very easy bosses. Right after you kill the boss that turns into a Rhino or big ass cow what ever that is a door opens up in the room that takes you to the big Murlock looking boss. 3 easy pulls to get to him and a very simple tank and spank kill.

Hall of Lightning is super easy for me but does take a while for a full clear.

If you have a paladin tank run regular Hall of Lightning for the tank trinket on the last boss that helps. Once I was able to get 15-25 tokens I purchased my totems, librams which made life much easier.

AV honor and WG tokens helped fill in a few gaps. Focus on getting your tank and healer geared up first.