Sorry if this is a repost blame me then.
In deadmines heroic on 1st boss , phase 2 the boss teleport to the middle of the room and small adds start spawning ( fire,air and earth ones ) Here is the tip : when you have weard tabard of orgrimmar,uc,tb,silvermoon etc etc they give about 16 rep EACH ! and there are many of them , so this is simple just hit boss with deasese or dot w/e once every 30 seconds so he dont despawn OR have a warrior with you to bug him with leap spell.
1.Wear Tabard
2.Take boss to phase 2
3. Start killing adds
4. make /lol
5. $$ Ambasador in about 2-3 hours $$
Sorry if its a repost or been fixed trying to contribute somehow