Ah! My field of expertise! For late main characters, skip the inapplicable items.
1) Make one of the inscription staffs, if the class to be boosted can use staffs at all.
2) On another character, upgrade the staff x2. Then send it to the Boostee.
3) Darkmoon trinket. They are absurdly cheap and you'll always find them in the AH (my server is one of the lowest populated in Europe and they're pretty much all there).
4) Scenarios. Hope for an epic drop.
5) Dungeons. While you're queuing, do dailies.
You should have enough gear to enter MV now.
Additional tricks require some gold and some planning, including gloves and chest crafted for your class (regular, not blood spirit gear).