As people have mentioned, farming heroic ToC is your best bet. The SP dagger, cloth shoes, mail shoulders, cloak and ring will be nice upgrades for you. Keep farming the daily quests for your T9 pieces. Once you have a most of the upgrades from ToC, you'll be fine to start running weekly VoA/Onyxia. I'd recommend starting these groups yourself at first. First, because if you try to join existing groups people have ridiculous standards even for the most basic raids. Second, because you can pick which classes to invite and group with people that wont compete for your loot

Side note.. best investments (IMO) for your first triumphs are .totem, shoulders, chest and helm, in that order. The reason I prefer to leave helm/legs/gloves till last are because those peces drop from Ony and VoA. It sucks when you spend 30 triumphs on something then get the same drop the next day.

You should also be running WG every time you can. It's a great source of honor, which you can use to gear out your characters with epic gems.